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Encode/decode Unicode text, URL-safe Base64, and small files in the browser.
Runs locally in your browser by default — nothing is uploaded first.
Upload encodes any local file directly in the browser. Text conversion never leaves this tab.
Use a sample, paste text, or upload a file to start.
Base64 Encoder / Decoder runs locally in your browser by default, so you can work with the content without uploading it first.
Encode and decode text or small files with standard and URL-safe Base64 output.
Does Base64 Encoder / Decoder run locally or in the cloud?
Base64 Encoder / Decoder runs locally in your browser by default, so you can work with the content without uploading it first.
What usually comes after Base64 Encoder / Decoder?
A common next step is to continue into related workflows such as Code and Data Formatting Tools.
Why does English text work while Japanese text breaks?
ASCII characters are represented similarly across many encodings, so encoding mistakes may stay hidden until non-ASCII text appears.
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.
collectionCode and Data Formatting ToolscollectionData Format Conversion ToolsEncode and decode text or small files with standard and URL-safe Base64 output.
