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encodeB64
Fast, private Base64 encoder for text, files & images
Free online Base64 encoder — runs entirely in your browser. No data sent to any server. Supports UTF-8 (correct handling), Base64URL (RFC 4648) for JWT tokens, MIME line splitting, per-line encoding, file encoding up to 100MB, and an Image to Base64 converter for JPG, PNG, GIF, WebP, SVG, BMP, ICO, TIFF and AVIF. Live mode, 12 languages. No sign-up. No ads. No file size limits.
Hey Product Hunt! 👋
I built encodeB64 because the existing Base64 tools online are either outdated, send your data to a server, or silently corrupt non-ASCII characters due to incorrect UTF-8 handling.
A few things I'm proud of:
- Everything runs client-side in the browser. Your data never leaves your machine.
- UTF-8 encoding is done correctly — TextEncoder → Uint8Array → btoa(), not just a raw btoa() call that breaks on any non-Latin-1 character.
- The image converter supports 9 formats and outputs 5 different formats (Data URI, raw Base64, CSS, HTML, Markdown) with a live preview rendered from the Base64 output itself — so you can verify it worked.
- 12 languages with actual translated pages (not just JS swapping text) so Google indexes each language independently.
The sister tool for decoding is decodeb64.com — launching here separately soon.
Happy to answer any questions about how it's built or the encoding edge cases it handles. Would love your feedback! 🙏
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About encodeB64 on Product Hunt
“Fast, private Base64 encoder for text, files & images”
encodeB64 was submitted on Product Hunt and earned 6 upvotes and 1 comments, placing #84 on the daily leaderboard. Free online Base64 encoder — runs entirely in your browser. No data sent to any server. Supports UTF-8 (correct handling), Base64URL (RFC 4648) for JWT tokens, MIME line splitting, per-line encoding, file encoding up to 100MB, and an Image to Base64 converter for JPG, PNG, GIF, WebP, SVG, BMP, ICO, TIFF and AVIF. Live mode, 12 languages. No sign-up. No ads. No file size limits.
encodeB64 was featured in Web App (122.4k followers), Productivity (653.8k followers) and Developer Tools (514k followers) on Product Hunt. Together, these topics include over 247.1k products, making this a competitive space to launch in.
Who hunted encodeB64?
encodeB64 was hunted by markys. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how encodeB64 stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
markys