All free online tools that run in your browser
Every tool works offline in the browser tab. No sign-up, no upload, no tracking — pick a tool and go.
Popular tools
All toolsJSON Formatter
2.4M uses
Base64 Encode
1.9M uses
Password Generator
1.7M uses
QR Code Generator
1.5M uses
UUID Generator
1.4M uses
SHA-256 Hash
1.2M uses
Word Counter
1.0M uses
Color Converter
960K uses
Resize Image
880K uses
BMI Calculator
790K uses
URL Encode
710K uses
MD5 Hash
640K uses
Base64 Decode
580K uses
Age Calculator
520K uses
JSON to TypeScript
460K uses
Regex Tester
410K uses
Character Counter
360K uses
CSV to JSON
320K uses
HEX to RGB
280K uses
Text to Speech
250K uses
More popular tools
- JSON Validator
- Timestamp to Date
- Percentage Calculator
- URL Decode
- Random Number
- Image to PNG
- RGB to HEX
- SHA-1 Hash
- JSON to CSV
- HTML Encode
- Simple Interest
- Text to Binary
- SHA-512 Hash
- Image to JPG
- Time Zone Converter
- JSON to YAML
- HTML Decode
- Random String
- Uppercase
- Image to Base64
- Loan Calculator
- Tip Calculator
- YAML to JSON
- Markdown to HTML
- UUID v1 (Time-based)
- Text to Hex
- Decimal to Binary
- Hex to Decimal
- Decimal to Hex
- Lorem Ipsum Generator
- Rotate Image
- JWT Decoder
- JSON Schema Generator
- URL Parser
- Factorial
- Fibonacci
- Prime Number Check
- Scientific Notation
- Roman Numeral
- Standard Deviation
All tools
Add Line Numbers
Number each line of text.
Space Out Letters
Add spaces between every letter.
Alternate Case
Alternate upper and lowercase letters.
Bigram Frequency
Count letter pair frequency.
Capitalize First Letter
Capitalize only the first letter of text.
Lowercase
Convert text to lowercase.
snake_case
Convert text to snake_case.
Title Case
Capitalize the first letter of each word.
ASCII to Text
Convert decimal ASCII codes to text.
Base32 Encode
Encode text to Base32 (RFC 4648).
Base58 Encode
Encode text to Base58 (Bitcoin alphabet).
Base64URL Decode
Decode URL-safe Base64 back to text.
Base64URL Encode
URL-safe Base64 encoding without padding.
Binary to Decimal
Convert binary numbers to decimal.
Binary to Hex
Convert binary numbers to hexadecimal.
Binary to Text
Convert 8-bit binary back to text.
CSS Formatter
Beautify CSS with proper indentation.
CSS Minify
Remove whitespace to minify CSS.
HTML Formatter
Beautify and indent HTML markup.
HTML to Markdown
Convert basic HTML to Markdown.
JS Formatter
Beautify JavaScript with indentation.
JS Minify
Minify JavaScript by removing comments and whitespace.
JSON Flatten
Flatten nested JSON into dot-notation keys.
JSON Minify
Minify JSON by removing whitespace.
EAN-13 Barcode Generator
Generate an EAN-13 barcode image.
Base Converter
Convert numbers between bases 2-36.
CIDR Range Calculator
Calculate the IP range of a CIDR block.
Cron Expression Parser
Explain a cron expression in plain words.
Current Timestamp
Get the current Unix timestamp.
Date to Timestamp
Convert a date/time to a Unix timestamp.
HTTP Status Codes
Look up the meaning of an HTTP status code.
IP to Decimal
Convert an IPv4 address to a decimal number.
Adler-32 Checksum
Compute the Adler-32 checksum.
AES Decrypt
Decrypt AES-GCM encrypted text.
AES Encrypt
Encrypt text with AES-GCM and a password.
Autokey Cipher
Encrypt text with the autokey cipher.
CRC32 Checksum
Compute the CRC32 checksum of a string.
CRC8 Checksum
Compute the CRC8 checksum.
HMAC SHA-256
Compute an HMAC-SHA256 signature.
Password Strength
Check the strength of a password.
Blur Image
Apply a blur effect to an image.
Brightness
Adjust image brightness.
Compress Image
Reduce image file size with quality control.
Contrast
Adjust image contrast.
Image Format Converter
Convert an image to PNG, JPG or WebP.
Crop Image
Crop a region of an image.
Grayscale
Convert an image to grayscale.
Hue Rotate
Rotate the hue of an image.
Color Blind Simulator
Simulate color blindness on a color.
Color Contrast Checker
Check the contrast ratio between two colors.
Gradient Generator
Generate a CSS gradient from two colors.
Color Picker
Pick a color and see all its formats.
Tetradic Colors
Generate a tetradic color scheme.
Text Color for Background
Pick black or white text for a background.
HEX to HSL
Convert a hex color to HSL.
HEX to HSV
Convert a hex color to HSV.
Acceleration Converter
Convert between m/s², g-force and more.
Area Converter
Convert between square meters, acres and more.
Data Storage Converter
Convert between bytes, KB, MB, GB and more.
Length Converter
Convert between meters, feet, miles and more.
Weight Converter
Convert between kilograms, pounds, ounces and more.
Power Converter
Convert between watts, horsepower and more.
Speed Converter
Convert between m/s, km/h, mph and knots.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Coin Flip
Flip a coin one or many times.
Dice Roller
Roll dice with custom number of sides.
EAN-13 Barcode
Generate valid EAN-13 barcode numbers.
Credit Card Generator
Generate Luhn-valid test credit card numbers.
Random Date
Generate random dates in a range.
Random Email
Generate random email addresses.
Random Hex Color
Generate random hex color codes.
Random IP Address
Generate random IPv4 addresses.
Age in Days
Calculate your exact age in days.
Age in Minutes
Calculate age in minutes.
Century Calculator
Find the century of a year.
Countdown
Calculate time remaining to a target date.
Add to Date
Add days, months or years to a date.
Date Difference
Calculate days between two dates.
Day of Week
Find the weekday of any date.
Day of Year
Find the day number within the year.
Add Percentage
Add a percentage to a number.
Average Calculator
Calculate the average of a list of numbers.
Commission Calculator
Calculate sales commission.
Compound Interest
Calculate compound interest growth.
Decimal to Fraction
Convert a decimal to a fraction.
Digital Root
Calculate the digital root of a number.
Discount Calculator
Calculate a discounted price.
Exponential Growth
Calculate exponential growth.
Acronym Generator
Create an acronym from a phrase.
ASCII Table
Show the full ASCII character table.
Aspect Ratio Calculator
Calculate screen aspect ratio.
Binary Converter
Convert binary to decimal, hex and octal.
Break-Even Calculator
Calculate break-even point in units.
Country Codes
Browse ISO country codes.
Credit Card Validator
Validate a credit card number with Luhn.
CSS Box Shadow Generator
Generate a CSS box-shadow.
BPM to Milliseconds
Convert BPM to milliseconds per beat.
MIDI to Note Name
Convert a MIDI number to a note name.
Morse Code Audio
Generate Morse code beeps for text.
Note to Frequency
Find the frequency of a musical note.
Note Name to MIDI
Convert a note name to a MIDI number.
Sawtooth Wave Generator
Generate a sawtooth wave tone.
Tone Generator
Generate a pure tone and download it as WAV.
Triangle Wave Generator
Generate a triangle wave tone.
chmod Calculator
Calculate chmod octal from permissions.
chmod Decoder
Decode a chmod octal value to permissions.
Deflate Decompress
Decompress Base64 deflate data back to text.
File Extension Info
Look up a file extension description.
File Hash
Compute MD5 and SHA-256 of a file.
File to Base64
Convert any file to a Base64 string.
Gzip Compress
Compress text with gzip to Base64.
JSON File Validator
Validate a JSON file.
Fantasy Name Generator
Generate a fantasy character name.
Daily Horoscope
Get your daily horoscope.
Keyboard Smash
Generate random keyboard smashing.
Love Calculator
Calculate love compatibility between two names.
Magic 8 Ball
Ask a question and get a mystical answer.
Random Fact
Get a random interesting fact.
Random Joke
Get a random programming joke.
Random Quote
Get a random inspirational quote.