Convert text to Base64 and back, with full UTF-8 support.
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Base64 encodes binary data as ASCII text so it survives email, JSON, HTTP headers and other text-only channels. This tool encodes any string to Base64 and decodes any Base64 back to the original text. It runs entirely in your browser, so passwords, API keys and PII never leave your device. Use it to debug data URIs, decode JWT segments, or inspect HTTP Basic Auth headers.
Load the page — Base64 Encoder is ready to use immediately, no login and no configuration required.
Enter, paste, or upload the data that Base64 Encoder needs — the input area at the top guides you with a placeholder example.
Trigger the action; the result appears in the output panel within a second or two.
Use the copy or download button to grab the output for your workflow — nothing is stored on our servers.
Base64 Encoder is built for people who want a fast, honest answer without wading through ads, sign-up walls, or feature bloat. Load the page, use the tool, get on with your day. Toolzer's design philosophy is simple: privacy-first (no tracking, no accounts), performance-first (the page is interactive in under a second on a 3G connection), and honesty-first (no fake ratings, no dark patterns, no upsells). Base64 Encoder follows the same rules as every other utility on the site. You can bookmark this page, share the URL with a colleague, or pin it to your browser's toolbar — the experience will be identical every visit, and it will keep working even if you're on airplane Wi-Fi. Real people use this tool for real work — freelancers cleaning up client deliverables, sysadmins triaging tickets, students finishing assignments — and it is tuned for those workflows, not for demo videos.
How Toolzer compares to typical online alternatives.
| Feature | Toolzer | Typical competitors |
|---|---|---|
| Price | 100% free | Free with limits or paid |
| Signup required | No | Usually yes |
| Data privacy | Processed in your browser | Uploaded to their server |
| Watermark | Never | Often on free tier |
| File size limit | Generous / none | Usually 5–10 MB |
| Ads | Minimal | Heavy, intrusive |
| Mobile friendly | Yes | Often not |
No. It is encoding — anyone can decode it instantly. Never rely on Base64 to protect secrets.
Every 3 bytes of input become 4 ASCII characters, which is the cost of staying inside the printable character set.
It replaces + and / with - and _ so the output can sit in URLs and filenames without escaping. JWTs use this variant.
Sometimes — small icons inlined as data: URIs. Larger images are better served as separate files for cacheability.
No. Every utility on Toolzer is free, anonymous, and works in any modern browser without registration.
Yes. Whenever the tool can produce an answer entirely in the browser, the data never leaves your device.
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
Yes. Every Toolzer page has a clean permanent URL you can bookmark or share.
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