202 free tools · no sign-up
Free tools.
Smarter results.
Simple, powerful online tools to help you get things done faster.
Popular: Mortgage Calculator, Word Counter, Unit Converter, Password Generator
The tools
202 tools
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01
Percentage Calculator
Find a percentage of a number, percentage change, and more — with the formula shown.
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02
Mortgage Calculator
Estimate your monthly home payment, total interest and a year-by-year balance.
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03
Loan Calculator
Monthly payment, total interest and payoff schedule for any fixed-rate loan.
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04
Compound Interest Calculator
See how savings grow with regular deposits and compounding over time.
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05
Savings Goal Calculator
See how long a savings goal will take, or how much to put away each month.
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06
Salary & Hourly Wage Calculator
Convert pay between hourly, daily, weekly, monthly and yearly amounts.
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07
Tip Calculator
Work out the tip and split the bill evenly, with an option to round up.
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08
Discount Calculator
Find the sale price and how much you save, including stacked discounts and tax.
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09
Sales Tax & VAT Calculator
Add tax to a price, or take it out of a tax-inclusive price. Works for VAT and GST.
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10
Profit Margin & Markup Calculator
Get profit, margin and markup from a cost and price — or set a price from a target margin.
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11
Fuel Cost Calculator
Work out what a drive will cost in fuel, in miles or kilometres.
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12
BMI Calculator
Body mass index in metric or US units, with the healthy weight range for your height.
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13
Age Calculator
Exact age in years, months and days, plus total days and the countdown to your next birthday.
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14
Date Calculator
Count the days between two dates, or add and subtract days, weekdays, months or years.
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15
Hours Calculator (Time Card)
Add up the hours you worked each day, minus breaks, with optional pay.
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16
Unit Converter
Convert length, weight, temperature, volume, area, speed, time and data sizes.
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17
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, simplified.
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18
Average Calculator
Mean, median, mode, range and standard deviation for any list of numbers.
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19
Grade Calculator
Turn a test score into a percentage and letter grade.
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20
Aspect Ratio Calculator
Find the aspect ratio of any size and resize without stretching.
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21
Roman Numeral Converter
Convert numbers to Roman numerals and back, from 1 to 3,999.
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22
Binary, Hex & Decimal Converter
Convert numbers between decimal, binary, hexadecimal and octal — any size.
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23
Simple Interest Calculator
Interest on a principal at a flat rate, over years, months or days.
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24
Credit Card Payoff Calculator
How long a card balance takes to clear, and the interest it costs.
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25
Inflation Calculator
What today’s money will cost, or be worth, years from now.
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26
ROI Calculator
Return on investment as a percentage, with an optional yearly rate.
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27
Break-Even Calculator
How many sales it takes to cover your costs.
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28
Overtime Pay Calculator
Regular and overtime pay at time and a half, double time or 1.25×.
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29
Unit Price Calculator
Compare two pack sizes and see which is the better deal.
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30
Electricity Cost Calculator
What an appliance costs to run per day, month and year.
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31
Area Calculator
Area of rectangles, triangles, circles and more, in m² and ft².
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32
Volume Calculator
Volume of boxes, cylinders, spheres and cones, in litres too.
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33
Calorie Calculator
Estimate daily calories (TDEE) and BMR from age, size and activity.
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34
Sleep Calculator
Bedtimes or wake-up times that line up with 90-minute sleep cycles.
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35
Running Pace Calculator
Pace per km and mile from distance and time, plus race predictions.
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36
Time Calculator
Add or subtract hours, minutes and seconds.
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37
GPA Calculator
Grade point average from letter grades and credits, on a 4.0 scale.
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38
CAGR Calculator
The steady yearly growth rate between a start and end value.
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39
APR to APY Calculator
Turn a nominal APR into the effective yearly rate (APY).
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40
Debt-to-Income Ratio Calculator
Your DTI ratio, the number lenders check before a loan.
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41
Net Worth Calculator
Add up what you own and owe to get your net worth.
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42
Pay Raise Calculator
Your new pay after a raise, as a percentage or an amount.
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43
Commission Calculator
Commission on a sale, with optional base pay.
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44
Exponent Calculator
Raise any number to any power, with roots and E notation.
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45
Ratio Calculator
Solve A : B = C : D for the missing value, and simplify ratios.
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46
Percent Error Calculator
How far a measured value is from the accepted one.
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47
Weighted Average Calculator
An average where some values count more than others.
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48
Rounding Calculator
Round to decimal places or the nearest 10, 100 or 1,000.
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49
Scientific Notation Converter
Convert numbers to and from scientific and E notation.
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50
LCM & GCF Calculator
Greatest common factor and least common multiple of any list.
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51
Prime Factorization Calculator
Break a number into primes, and check whether it is prime.
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52
Quadratic Equation Solver
Solve ax² + bx + c = 0, including complex roots.
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53
Pythagorean Theorem Calculator
Find the missing side of a right triangle.
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54
Circle Calculator
Area, circumference, radius and diameter from any one of them.
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55
Ohm’s Law Calculator
Volts, amps, ohms and watts from any two of them.
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56
Speed, Distance & Time Calculator
Solve for speed, distance or travel time.
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57
Download Time Calculator
How long a file takes to download at your connection speed.
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58
Gas Mileage Calculator
Your car’s real mpg or L/100 km from a fill-up.
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59
Paint Calculator
How much paint a room needs, in litres or gallons.
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60
Tile Calculator
How many tiles and boxes to buy for a floor or wall.
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61
Concrete Calculator
Concrete for a slab in cubic yards or metres, plus bag counts.
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62
Week Number Calculator
The ISO week number and day of the year for any date.
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63
Currency Converter
Convert between 30 currencies with the European Central Bank’s daily rates.
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64
Word Counter
Count words, characters, sentences and paragraphs instantly as you type.
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65
Case Converter
Switch text between UPPERCASE, lowercase, Title Case and Sentence case.
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66
Remove Duplicates & Sort Lines
Remove duplicate and empty lines, trim spaces and sort any list.
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67
Find and Replace
Find and replace words or patterns in any text, with whole-word and regex options.
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68
Remove Line Breaks
Join broken lines from PDFs and emails while keeping paragraphs intact.
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69
URL Slug Generator
Turn titles into clean, SEO-friendly URL slugs, one or many at a time.
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70
Lorem Ipsum Generator
Placeholder text by paragraphs, sentences or words for mockups and layouts.
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71
Base64 Encode & Decode
Encode text to Base64 or decode it back, with full Unicode support.
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72
URL Encode & Decode
Percent-encode text for URLs and query strings, or decode it back.
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73
Sort Lines Alphabetically
Sort a list A–Z, Z–A, by number or by length.
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74
Remove Duplicate Lines
Delete repeated lines from a list and keep the first of each.
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75
Add Line Numbers
Number every line of text, with your choice of format.
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76
Add Prefix & Suffix to Lines
Add text to the start or end of every line at once.
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77
Reverse Text
Write text backwards, or reverse the order of words or lines.
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78
Text Repeater
Repeat a word or phrase as many times as you like.
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79
Word Frequency Counter
See which words you use most, with counts and percentages.
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80
Email Extractor
Pull every email address out of a block of text.
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81
URL Extractor
Pull every link out of a block of text.
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82
Remove HTML Tags
Strip HTML tags and get clean plain text.
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83
HTML Entity Encoder & Decoder
Escape special characters for HTML, or decode entities.
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84
Morse Code Translator
Translate text to Morse code and back.
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85
Caesar Cipher & ROT13
Encode or decode a Caesar shift cipher, including ROT13.
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86
NATO Phonetic Alphabet Converter
Spell out codes and names as Alfa, Bravo, Charlie…
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87
JSON Formatter & Validator
Pretty-print, minify and validate JSON, with the exact line of any error.
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88
CSV to JSON Converter
Turn CSV or spreadsheet data into JSON.
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89
JSON to CSV Converter
Turn a JSON array into CSV for spreadsheets.
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90
Hash Generator (SHA-256, SHA-1, MD5)
SHA-256, SHA-1 and MD5 hashes of any text.
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91
JWT Decoder
Read the header and payload of a JSON Web Token.
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92
Binary Translator
Text to binary, hex, decimal or octal bytes — and back.
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93
Color Converter & Contrast Checker
Convert HEX, RGB and HSL colours and check text contrast against WCAG.
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94
Unix Timestamp Converter
Convert Unix timestamps to readable dates and dates back to timestamps.
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95
UUID Generator
Generate random version 4 UUIDs (GUIDs), one or a thousand at a time.
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96
Password Generator
Create strong random passwords locally in your browser. Nothing is sent or stored.
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97
Random Number Generator
Fair random numbers in any range — roll dice, flip coins or draw unique lottery picks.
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98
Character Counter
Count characters, bytes and SMS parts, with limits for X, Instagram and more.
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99
Text Diff Checker
Compare two texts and highlight every added, removed and changed line.
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100
Markdown Previewer
Write Markdown and see the formatted result live, then copy the HTML.
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101
Remove Extra Spaces
Collapse double spaces, trim lines and remove extra blank lines.
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102
Random Text Generator
Generate random words, sentences, paragraphs or character strings.
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103
RTF to TXT Converter
Extract plain text from an RTF (rich text) file.
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104
JSON Validator
Check JSON and get the exact line, column and reason for any error.
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105
JSON Minifier
Strip all whitespace from JSON to make it as small as possible.
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106
HTML Formatter
Indent messy or minified HTML so it’s easy to read.
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107
HTML Minifier
Remove comments and extra whitespace from HTML.
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108
CSS Formatter
Turn minified CSS into neatly indented, readable rules.
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109
CSS Minifier
Compress CSS by removing comments and whitespace.
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110
JavaScript Minifier
Minify JavaScript with Terser: shorter names, no comments, smaller files.
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111
Regex Tester
Test regular expressions live with highlighted matches and groups.
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112
SQL Formatter
Format SQL queries with clauses on their own lines and uppercase keywords.
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113
XML Formatter
Validate, pretty-print or minify XML.
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114
XML to JSON Converter
Convert XML to JSON, with attributes, repeated elements and numbers handled.
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115
YAML to JSON Converter
Convert YAML to JSON, or JSON to YAML, with clear error messages.
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116
HTTP Status Code Lookup
Look up what any HTTP status code means, from 100 to 511.
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117
Password Strength Checker
See how strong a password really is, checked privately on your device.
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118
Random Token Generator
Generate secure random tokens and secrets in hex, Base64 or UUID format.
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119
SHA-256 Hash Generator
Create SHA-256 and HMAC-SHA256 hashes of any text.
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120
Text Encryption & Decryption
Encrypt a message with a passphrase using AES-256, and decrypt it later.
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121
Robots.txt Generator
Create a robots.txt file to guide search engines and AI crawlers.
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122
Sitemap.xml Generator
Turn a list of page URLs into a valid XML sitemap.
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123
Privacy Policy Generator
Draft a plain-English privacy policy template for your website.
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124
Terms and Conditions Generator
Draft a simple terms and conditions template for a website.
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125
Time Zone Converter
Convert a time between time zones, with daylight saving handled for you.
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126
Online Stopwatch
A precise stopwatch with lap times and keyboard shortcuts.
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127
Countdown Timer
Count down a length of time or to a date, with a beep at the end.
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128
Typing Speed Test
Measure your typing speed in words per minute, and your accuracy.
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129
File Size Converter
Convert between bytes, KB, MB, GB and TB, and binary KiB, MiB, GiB.
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130
CSS Gradient Generator
Design linear, radial and conic gradients and copy the CSS.
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131
Box Shadow Generator
Build soft, layered CSS box shadows visually.
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132
Border Radius Generator
Round corners visually, all at once or one by one.
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133
CSS Button Generator
Design a button and copy the CSS, including hover and focus styles.
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134
Color Palette Generator
Generate harmonious colour palettes from one base colour.
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135
Font Pairing Previewer
Preview heading and body font combinations and copy the CSS.
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136
Meta Tag Generator
Generate SEO and social meta tags for your page’s <head>.
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137
Open Graph Previewer
Preview how a link card will look when shared, and get the OG tags.
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138
Favicon Previewer
See your favicon in browser tabs, bookmarks and on a home screen.
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139
Responsive Screen Size Tester
View a web page at phone, tablet and desktop sizes side by side.
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140
QR Code Generator
Make QR codes for links, Wi-Fi, email, phone and text. PNG or SVG, free forever.
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141
Image Compressor
Shrink JPG, PNG and WebP images in your browser, in batches, with a quality slider.
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142
Image Resizer
Resize images to exact pixels or a percentage, keeping proportions, in batches.
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143
Image Format Converter
Convert images between PNG, JPG, WebP, ICO and BMP right in your browser.
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144
Image Cropper
Crop images by dragging a box, with presets for square, 16:9 and social posts.
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145
Image Rotator
Rotate, flip and straighten images, then download them.
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146
HEIC to JPG Converter
Convert iPhone HEIC photos to JPG or PNG without uploading them.
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147
JPG to PNG Converter
Convert JPG photos to lossless PNG files, many at a time.
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148
WebP to JPG Converter
Convert WebP images to JPG so they open everywhere.
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149
SVG to PNG Converter
Render SVG files as sharp PNG, JPG or WebP images at any size.
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150
PNG to SVG Converter
Trace a PNG or JPG into a scalable SVG vector, ideal for logos and icons.
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151
PNG to ICO Converter
Turn a PNG into a multi-size .ico file for websites and Windows.
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152
Favicon Generator
Make a complete favicon set from an image or letters, with the HTML to paste.
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153
Color Picker from Image
Click anywhere on an image to get its HEX, RGB and HSL colour, plus its main colours.
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154
Image Metadata Viewer
See hidden EXIF data such as camera, date and GPS location, and save a clean copy.
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155
ZIP File Creator
Bundle files or a whole folder into a ZIP archive without uploading anything.
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156
ZIP File Extractor
Open a ZIP file, see what’s inside and download individual files.
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157
CSV to Excel Converter
Turn CSV data into a real .xlsx spreadsheet with a bold, frozen header row.
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158
Excel to CSV Converter
Convert any sheet of an .xlsx workbook to a CSV file.
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159
JSON to Excel Converter
Turn a JSON array into an Excel spreadsheet, flattening nested fields.
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160
PDF Compressor
Make PDFs smaller for email and upload limits, without uploading them anywhere.
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161
Merge PDF
Combine several PDFs, and images, into one PDF in the order you choose.
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162
Split PDF
Split a PDF by page ranges, every few pages, or into single pages.
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163
JPG to PDF Converter
Turn photos and images into a PDF, one per page, in any order.
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164
PDF to JPG Converter
Save PDF pages as JPG images at the resolution you choose.
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165
PDF to PNG Converter
Convert PDF pages to crisp, lossless PNG images.
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166
PDF to Word Converter
Get a PDF’s text into an editable Word (.docx) document.
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167
Word to PDF Converter
Convert .docx documents to PDF in your browser, with headings, lists and tables.
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168
PDF to Text Converter
Extract all the text from a PDF to copy or save as .txt.
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169
PDF Page Rotator
Rotate single pages or the whole PDF and save it permanently.
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170
PDF Page Deleter
Remove unwanted pages from a PDF and save the rest.
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171
PDF Page Organizer
Reorder, rotate and remove PDF pages by dragging thumbnails.
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172
PDF Password Protector
Add a password to a PDF with AES-256 encryption, right in your browser.
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173
PDF Unlocker
Remove the password from your own PDFs when you know it, or lift printing and copying restrictions.
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174
Audio Format Converter
Convert audio between MP3, WAV, M4A, OGG, Opus and FLAC, in batches.
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175
MP3 to WAV Converter
Convert MP3 files to uncompressed WAV for editing or CDs.
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176
WAV to MP3 Converter
Shrink WAV recordings into MP3 at the quality you choose.
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177
Audio Trimmer
Cut a section out of any audio file, with optional fades, and save it as MP3 or WAV.
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178
Audio Merger
Join several audio files into one, in any order, with optional pauses and fades.
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179
Audio Speed Changer
Speed up or slow down audio, with or without changing the pitch.
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180
Silence Remover
Automatically cut long pauses and dead air from recordings.
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181
Online Voice Recorder
Record your voice from the microphone and save it as MP3 or WAV.
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182
Text to Speech
Have any text read aloud with your device’s voices, at the speed you like.
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183
Audio to Text
Transcribe recordings to text with an AI model that runs on your device.
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184
Speech to Text
Speak into your microphone and get the text, transcribed on your device.
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185
Subtitle Generator
Create SRT or WebVTT subtitles for a video automatically, on your device.
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186
Video to MP3 Converter
Extract the soundtrack of a video as an MP3.
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187
Video Compressor
Make videos much smaller for email, chat apps and uploads.
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188
Video to GIF Converter
Turn a few seconds of video into a looping GIF.
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189
GIF to MP4 Converter
Convert animated GIFs to MP4 videos that are often 90% smaller.
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190
Video Trimmer
Cut a clip from a video, instantly and without quality loss.
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191
Video Resizer
Change a video’s resolution or reshape it for Reels, Stories and square posts.
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192
Video to Frames
Save stills from a video: the current frame, one every few seconds, or a set number.
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193
Subtitle Extractor
Save the subtitle tracks embedded in MKV and MP4 files as SRT, VTT or ASS.
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194
Video Metadata Viewer
See a video’s codec, resolution, frame rate, bitrate, tracks and tags.
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195
Image to Text (OCR)
Extract text from photos and scans with OCR that runs on your device.
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196
Screenshot to Text
Paste a screenshot and copy the text in it. OCR runs on your device.
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197
Background Remover
Remove the background from photos of people, pets and products, on your device.
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198
AI Image Upscaler
Enlarge photos 2× or 4× with an AI model that adds real detail, on your device.
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199
Username Generator
Turn a few keywords into creative, available-looking usernames for any platform.
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200
Bio Generator
Write a social media bio in your style that fits the platform’s character limit.
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201
Hashtag Generator
Get relevant hashtag ideas for your topic, grouped from specific to broad.
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202
Fancy Text Generator
Bold, italic, script and other copy-and-paste text styles.
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Why they’re useful
Most tool sites bury a two-second task under sign-ups, pop-ups and upsells. Each CapyHelp page does one job and gets out of your way.
Answers as you type
Counts, conversions and calculations update on every keystroke. There’s no submit-and-wait.
Your data stays put
The core tools run in your browser. Text, numbers and passwords never reach a server.
No account, no trial
Open a page and use it. Nothing to sign up for, nothing that expires.
Works on any screen
Built for phones as much as desktops, with full keyboard and screen reader support.
Common questions
Something else on your mind? Get in touch.
Are CapyHelp tools really free?
Yes. All tools are free to use with no account. The site may show clearly marked ads or affiliate recommendations to cover running costs.
Do you store the text or data I enter?
The core tools run entirely in your browser, so your input stays on your device. Optional AI features, where available, are clearly labeled and send only the input needed to generate a result.
Do I need to create an account?
No. There are no accounts, and you can use every tool immediately.
Do the tools work on my phone?
Yes. Every tool is designed to work on phones, tablets and desktops.
Can I suggest a new tool?
Yes, we would love to hear what would help you. See the Contact page for how to reach us.