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Developer Tools
Base64 Encode File Online
Encode any file to Base64 online free in your browser — no upload to a server.
Runs in your browser — no uploadChoose your Any file
Drag & drop here, or pick a file from your device
Any file
Processed on your device — size is limited only by your browser's memory
Outputs a UTF-8 text file containing the Base64 string.
Working...
🔒 This tool works offline inside your browser tab. Your file is never uploaded, and results are discarded when you close the page.
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About this tool
Base64 Encode File Online
Convert small files into Base64 text for APIs, data URIs or debugging.
Adjust the settings
Download the Base64-encoded text output.
Download
The finished file is created on your device and downloads straight away.
Base64 Encode File Online FAQs
Is filecompress.in really free?
Yes. All 100+ tools are free with no daily limit. Optional accounts unlock higher quality presets.
Do my files get uploaded?
No. Compression runs in your browser tab. Check the network panel — no file is sent.
How do I compress PDF to 100KB?
Open Compress PDF to 100KB, upload your PDF and pick a compression level. The tool targets your size limit.
Can I make a passport photo online?
Yes. Use Passport Photo Maker — upload a portrait, pick 2×2 inch size and download a white-background photo.
Does this work on mobile?
Yes, on Android, iPhone and iPad browsers. Very large files depend on device memory.
Will the visit counter reset when you update the site?
No. Visit counts are stored in our MySQL database, not in the static files we deploy.