DevToolbox

All Developer Tools

Every free tool on DevToolbox in one place — 42 tools across developer tools, text tools, converters, and generators. Use the filters below to narrow the list, or search by name.

JSON Formatter & Validator Format, validate, and minify JSON with instant error reporting.
JSON Minifier Compress JSON by removing whitespace and line breaks.
Regex Tester Test regular expressions against sample text with live match highlighting.
JWT Decoder Decode JSON Web Tokens and inspect the header and payload.
Hash Generator Generate SHA-256, SHA-384, and SHA-512 hashes from text.
HTML Formatter Beautify and indent messy or minified HTML.
CSS Formatter Beautify and indent minified or messy CSS.
JavaScript Formatter Beautify minified or messy JavaScript code.
HTTP Status Code Reference Searchable reference of HTTP status codes and their meanings.
MIME Type Lookup Look up the MIME type for a file extension, or vice versa.
User-Agent Parser Parse a User-Agent string into browser, OS, and device details.
Word Counter Count words, characters, sentences, and estimate reading time.
Text Case Converter Convert text between UPPERCASE, camelCase, snake_case, and more.
Text Diff Checker Compare two blocks of text and highlight the differences.
Markdown Previewer Write Markdown and see the rendered HTML output live.
Base64 Encoder Encode text into Base64 format.
Base64 Decoder Decode Base64 strings back into readable text.
URL Encoder Percent-encode text for safe use in URLs.
URL Decoder Decode percent-encoded URL text back to readable form.
Color Converter Convert colors between HEX, RGB, and HSL formats.
HEX to RGB Converter Convert HEX color codes to RGB values.
RGB to HSL Converter Convert RGB color values to HSL.
Unix Timestamp Converter Convert between Unix timestamps and human-readable dates.
Date to Unix Timestamp Convert a calendar date and time to a Unix timestamp.
Unix Timestamp to Date Convert a Unix timestamp into a readable date and time.
JSON to CSV Converter Convert a JSON array of objects into a CSV file.
CSV to JSON Converter Convert CSV data into a JSON array of objects.
XML to JSON Converter Convert XML documents into JSON format.
YAML to JSON Converter Convert YAML configuration into JSON format.
Binary to Decimal Converter Convert binary numbers to decimal (base-10).
Decimal to Binary Converter Convert decimal numbers to binary (base-2).
Binary to Hex Converter Convert binary numbers to hexadecimal.
Hex to Binary Converter Convert hexadecimal numbers to binary.
CSS Gradient Generator Visually build CSS linear and radial gradients.
CSS Box Shadow Generator Visually build CSS box-shadow effects.
UUID Generator Generate random UUID v4 identifiers.
Password Generator Generate strong, random passwords with custom rules.
Random String Generator Generate random strings with custom length and character sets.
QR Code Generator Generate QR codes for URLs, text, email, phone, and Wi-Fi.
Lorem Ipsum Generator Generate placeholder Lorem Ipsum text.
Meta Tag Generator Generate SEO meta tags, Open Graph, and Twitter Card markup.
Robots.txt Generator Generate a robots.txt file for search engine crawlers.