DevToolbox
A comprehensive collection of 100+ free, client-side developer tools. All processing happens in your browser – your data never leaves your device.
Format, validate, and beautify JSON data.
Format and beautify XML data.
Beautify and format CSS code.
Encode and decode text to and from Base64.
Encode or decode strings for use in URLs.
Parse a URL into its components (protocol, host, path, etc.).
Generate MD5, SHA1, SHA256, SHA512 hashes.
Generate a keyed-hash message authentication code (HMAC).
Hash and verify passwords with Bcrypt.
Calculate checksums like CRC32 for text.
Decode and inspect JSON Web Tokens.
Create new JSON Web Tokens from scratch.
Generate universally unique identifiers (UUIDs).
Test regular expressions against strings.
Convert special characters to and from HTML entities.
Convert HTML content to Markdown.
Remove HTML tags from a string.
Minify HTML code to reduce file size.
Minify CSS code to reduce file size.
Minify JavaScript code using Terser.
Beautify and format SQL queries.
Parse a cron string into a human-readable format.
Convert between Unix timestamps and human-readable dates.
Convert between px, em, rem, and pt.
Convert between HEX, RGB, HSL, HWB, and CMYK.
Calculate Linux file permissions visually.
Find the MIME type for a file extension.
Compress and decompress text using Gzip.
Display screen resolution, color depth, etc.
Display information from your browser user agent.
Inspect properties of keyboard events.
Compress JPG/PNG images to reduce file size.
Resize images to your desired dimensions.
Convert images between PNG, JPEG, and WEBP.
Create a favicon.ico from an image file.
Extract a color palette from an image.
Merge multiple PDFs into one or split a PDF into parts.
Convert between CSV and JSON formats.
Convert an image file to a Base64 string.
Decode a Base64 string into a downloadable file.
View the binary content of a file.
Convert data between JSON and YAML formats.
Convert data between JSON and XML formats.
Convert SVG code or files to PNG or JPEG.
Convert SVG to a CSS background-image.
Visualize the frequency spectrum of an audio file.
Create QR codes from text or URLs.
Write Markdown and see a live preview.
Color picker, gradient generator, and converters.
Generate strong, secure passwords.
