Find the right tool, get it done, and get on with your day.
Validate and format JSON
Encode and decode text
Convert CSV and JSON
Generate secure UUIDs
Compress images locally
Count words, characters and lines
Uppercase, lowercase and title case
Remove repeated lines
Sort text lines alphabetically
Trim spaces and blank lines
Reverse text or line order
Encode and decode URL components
Hash text securely in your browser
Convert between Unix and calendar time
Validate and indent XML
Escape and unescape HTML entities
Remove unnecessary JSON whitespace
Generate strong random passwords
Create and download QR codes
Generate placeholder paragraphs
HEX to RGB and HSL
Calculate a percentage of a number
Solve direct proportions
Days between two dates
Convert length, mass and temperature
Convert bytes, KB, MB and GiB
Resize locally in your browser
Export PNG, JPEG or WebP
Rotate images by 90 degrees
Crop to your chosen dimensions
Preview CSV data in a table
Switch CSV separator characters
Check JSON syntax
Calculate IPv4 subnet ranges
Estimate file transfer duration
Compare two texts line by line
Replace matching text
Remove blank lines
Find email addresses in text
Find web links in text
Count frequent words
Inspect JWT header and payload without verification
Convert YAML and JSON
Minify CSS stylesheets
Indent SQL queries
Find regex matches interactively
Binary, decimal and hexadecimal
Generate CSS gradients
Preview CSS box shadows
Check WCAG text contrast
Create a favicon from an image
Calculate voltage, current, resistance and power
Calculate LED current-limiting resistance
Decode resistor color bands
Calculate voltage divider output
Convert professional audio levels
Calculate acoustic delay by distance
Calculate image or video dimensions
Estimate uncompressed audio storage
Mean, median and mode
Add and simplify fractions
Calculate compounded growth
Find discounted prices
Convert IPv4 dotted and numeric formats
Calculate inverse subnet masks