Base64: Formats, File Types, and Size Limits

Formats, file types, and size limits for Base64

Knowing what Base64 Encode/Decode accepts makes your workflow smoother.

Supported formats

The tool accepts text and data inputs rather than uploaded files.

Size limits

Base64 Encode/Decode processes up to 50 MB. Because everything runs in your browser, the practical limit is your device's memory — not a crowded server.

Getting the best output

• Use the newest formats you can for the best quality-to-size balance
• When quality matters, choose lossless options; when sharing, choose compact ones
• Keep a backup of your original input before processing

Verdict

Base64 Encode/Decode handles text and data inputs as needed and up to 50 MB with no file ever leaving your device.