Base64 Encoder / Decoder
Workspace
This workspace processes the content directly in your browser.
Formatting, decoding, validation, and common file work stay local whenever possible, then continue in the same result area for copy, download, or the next step.
Paste content, choose a file, or load a sample first.
The content stays in the local browser by default.
After processing, copy, download, or continue into a related workflow.
Input
Upload encodes any local file directly in the browser. Text conversion never leaves this tab.
Result
Use a sample, paste text, or upload a file to start.
Encode and decode text or small files with standard and URL-safe Base64 output.
Common tasks
- Quick text encoding
- Decode copied Base64 strings
- Handle small browser-side files
A technical explanation of Unicode, UTF-8, Shift-JIS, byte sequences, mojibake, and how to debug encoding problems with small samples.
Base64 Explained: Encoding, Padding, Data URLs, and Common MistakesA technical article on how Base64 turns bytes into text, why padding exists, how URL-safe variants differ, and why Base64 is not encryption.
URL Encoding Explained: Percent Encoding, Query Strings, and Safe LinksA technical article on percent encoding, query parameters, path segments, form encoding, and why URLs break when reserved characters are copied raw.
Key Questions
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