About encodedecode.app
Free developer encoding & decoding tools. No signup, no upload, no limits.
What is encodedecode.app?
encodedecode.app is a collection of free developer tools for encoding and decoding data. All tools are instant, private, and run entirely in your browser. There is no server processing your data — ever.
Tools available
Base64 Encode / Decode
Encode text and files to Base64, decode Base64 strings, image preview
URL Encode / Decode
Percent-encode URL components, decode encoded URLs
HTML Encode / Decode
Convert HTML special characters to entities and back
JWT Decoder
Decode JSON Web Tokens, inspect claims, check expiry
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 from text or files
Privacy first
Every tool on encodedecode.app processes data exclusively in your browser. We use only native browser APIs:btoa(),atob(),encodeURIComponent(),crypto.subtle, and the FileReader API. No data is ever transmitted to any server.
Built for developers
This site is built by developers, for developers. The goal is a tool you can bookmark and use every day without friction — no popups, no account requirements, no file size limits. Just fast, private encoding and decoding that works.