Color Converter
Convert between HEX, RGB, RGBA, and HSL with a fast browser-based color converter.
Free Online Developer Tools
Developer Toolbox helps you convert images, validate JSON, decode JWTs, generate QR codes, and work faster with browser-based utilities that run locally.
Every tool is designed to be quick, simple, and privacy-friendly, with processing handled in your browser whenever possible.
Browse Developer Tools
Use the links below to jump straight into each tool page. These utility pages are built for common developer workflows including image conversion, token inspection, JSON formatting, and QR code creation.
Image to Base64 Converter
Convert PNG, JPEG, and GIF images to Base64 strings, HTML image tags, or CSS background values.
Base64 Encode and Decode
Encode plain text to Base64 and decode Base64 back to text locally in your browser.
Image to PNG Converter
Convert JPEG, GIF, BMP, WebP, AVIF, and TIFF images to PNG directly in your browser.
Image to JPEG Converter
Convert PNG, GIF, BMP, WebP, AVIF, and TIFF images to JPEG locally in your browser.
Image to WebP Converter
Convert PNG, JPEG, GIF, BMP, TIFF, and AVIF images to WebP with adjustable quality settings.
Image to Favicon Converter
Create a 32x32 favicon from PNG, JPEG, GIF, BMP, WebP, or TIFF images in your browser.
QR Code Generator
Generate QR codes for URLs and text, customize colors and size, and download the result as PNG.
Ultimate Case Converter
Convert text into camelCase, PascalCase, snake_case, kebab-case, dot.case, Title Case, Sentence case, and more.
URL Encode and Decode
Encode and decode URLs, query strings, and text locally in your browser with instant results.
JavaScript Beautifier
Beautify JavaScript code locally in your browser with clean indentation and readable formatting.
JSON Validator and Beautifier
Validate, format, and beautify JSON instantly with a browser-based JSON validator.
JWT Decoder and Token Tester
Decode JWT headers and payloads, inspect signatures, and review token contents locally in your browser.
Fast Browser Tools
Most tools run client-side so you can convert files and inspect data without waiting on a server round trip.
Built for Common Tasks
The toolbox focuses on practical developer needs such as image conversion, Base64 output, JWT decoding, JSON formatting, and QR code downloads.
Clean Internal Navigation
Every tool is linked from the homepage, which helps visitors and search engines discover the full set of utility pages.