How it works
Paste UTF-8 text and switch between encode and decode. Results appear instantly using in-browser Base64 routines.
Encode UTF-8 text to Base64 or decode strings locally.
Plain text
Base64 output
Paste UTF-8 text and switch between encode and decode. Results appear instantly using in-browser Base64 routines.
Conversions run in your tab with JavaScript — no desktop app required.
Files stay on your device during processing. We do not receive your uploads.
Heavy codecs and AI models run locally via Web Workers and WASM (FFmpeg.wasm, Transformers.js).
Paste UTF-8 text and switch between encode and decode. Results appear instantly using in-browser Base64 routines.
Not for secrets alone — encoding is not encryption. Very large strings may hit browser string limits. Processing is 100% offline in your browser — files never leave your device.
Yes. This tool is free convert online with no signup. Processing stays in your browser — no uploads.
You control quality settings. Choose higher quality for no quality loss when converting online.
Every conversion runs inside your browser tab using JavaScript and Web Workers. There is no background server queue and no account is required for core tools.
Your files are never uploaded to FreeConvertKit for processing. Originals, previews, and exports stay on your device unless you choose to download or share them yourself.
When codecs or AI models are needed, WebAssembly modules such as FFmpeg.wasm and Transformers.js execute locally — giving you desktop-class power with absolute file privacy.
Count words, characters, paragraphs, and reading time in real time.
Strip line breaks, extra spaces, and empty lines from pasted text.
Encode or decode URL strings safely in the browser.
UPPERCASE, lowercase, Title Case, Sentence case, and camelCase.
Convert Markdown to HTML with raw source and live preview.