Free Online Developer Tools
Format and validate JSON, encode and decode Base64, and handle common developer tasks — all free, all browser-based, with no data sent to any server.
JSON Formatter
Format and validate JSON data.
Base64 Encoder / Decoder
Encode or decode Base64 strings.
Developer Utilities That Respect Your Data
Developers regularly work with sensitive data: API keys, configuration payloads, authentication tokens, and internal JSON structures. Pasting this data into online tools that send it to a server is a security risk. Our developer tools run entirely in your browser — no data is ever transmitted, logged, or stored. The JSON Formatter uses the browser's native JSON.parse(); the Base64 encoder uses the browser's built-in TextEncoder and atob/btoa APIs.
More developer tools are in development for this section, including URL encoder/decoder, HTML entity encoder, regex tester with live highlighting, color converter (HEX/RGB/HSL), and markdown previewer. Each will follow the same privacy-first, client-side architecture.