What is the file size limit?

Since processing runs in browser RAM, files up to 25MB are handled smoothly without crashing.

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Base64 File Converter

Encode any file into Base64 or decode Base64 strings back to downloadable files.

How to Use Base64 File Converter

1Select mode: 'File to Base64' or 'Base64 to File'.
2Drop your file to convert it to a Base64 Data URI.
3Or paste Base64 code and click Download File.
4Copy encoded text or data URI with one click.

Key Features & Benefits

Encodes any file type (PNG, JPEG, PDF, ZIP, TXT) to Base64
Generates full HTML Data URI format (`data:mime;base64,...`)
Decodes Base64 back into binary files with proper file extension
All processing occurs locally in browser memory

About Base64 File Converter

Convert images, documents, audio, or PDFs into Base64 data URIs for embedding in HTML/CSS. Or decode raw Base64 strings back into downloadable binary files.

Unlike traditional web tools that send your personal data, uploaded photos, or sensitive text to remote cloud servers, our Base64 File Converter operates strictly inside your client browser sandbox. This guarantees high processing speeds without network throttling, and ensures your data privacy is completely preserved.