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Utilities • 100% Private
About Base64 Encoder / Decoder
Product Documentation, Architecture & Offline Privacy Verification
What It Does
Instantly encode text and files to Base64, or decode Base64 strings back to text with complete local privacy.
How It Works
Key Features
- 100% Client-Side Privacy: Zero network egress. Your data never leaves your device.
- Text & File Support: Instantly encode plain text or upload files to generate Data URIs.
- Unicode Safe: Safely encodes and decodes UTF-8 strings, special characters, and emojis.
Limitations & Compatibility
Frequently Asked Questions
Is my data sent to a server?
No. The entire Base64 encoding and decoding process executes strictly locally within your browser. Your text and files are never uploaded to any external server, ensuring absolute privacy.
What is the maximum file size for encoding?
We support files up to 5MB to ensure stable browser performance. For text, the limit is 1,000,000 characters.
Does this tool support Unicode and Emojis?
Yes! Unlike native JavaScript implementations which can crash on multi-byte characters, our encoder properly handles UTF-8 strings including emojis.
Ready to use Base64 Encoder / Decoder?
100% private, instant offline processing directly in your browser with zero data retention.
