Encode text or files to Base64 and decode back online free. Unicode-safe, instant data URIs for developers — runs 100% in your browser.
Base64 Encode & Decode Online is part of ToolsPilot — a free online toolkit for PDFs, images, audio and video. No signup, no watermark and no software to install. Your file is processed entirely in your browser, so it never leaves your device.
How to use Base64 Encode & Decode Online
For text: paste into either box and click Encode → or ← Decode.
For files: switch to “File → Base64”, pick a file (up to 10 MB) and copy the Base64 or ready-to-paste data URI.
Use the copy buttons — long outputs are truncated on screen but copy in full.
Frequently asked questions
Is Base64 Encode & Decode Online free to use?
Yes. Base64 Encode & Decode Online on ToolsPilot is 100% free with no account, no watermark and no daily limits for everyday use.
Are my files private and secure?
Base64 Encode & Decode Online runs entirely in your browser, so your file never leaves your device — nothing is uploaded to any server.
Do I need to install any software?
No. Base64 Encode & Decode Online works online in any modern browser on Windows, macOS, Linux, Android and iOS — there is nothing to download or install.
Does it handle emoji and non-English text?
Yes — encoding is UTF-8 based, so Unicode text round-trips correctly (plain btoa would corrupt it).
Why is there a 10 MB file limit?
Base64 output is ~33% larger than the file and lives in page memory — bigger files would freeze the tab. For large files, use the ZIP tool instead.