Base64 Encoder / Decoder
Encode and decode Base64 text locally in your browser.
Local developer encoding tool
Convert text and Base64 safely.
Encode Unicode text to Base64 or decode Base64 back to readable text without uploading data.
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When should you use Base64?
Base64 is commonly used to represent text or binary data in APIs, embeds, tokens, and data transfer workflows where plain text transport is needed.
This tool validates Base64 before decoding and supports URL-safe variants that use hyphens and underscores.
Frequently Asked Questions
Is this Base64 tool free?
Yes. You can encode, decode, copy, and clear text without signup.
Is my text uploaded?
No. All encoding and decoding happens locally in your browser.
Does it support Unicode?
Yes. UTF-8 text, emojis, accents, and non-Latin scripts are preserved.
What is URL-safe Base64?
URL-safe Base64 replaces + and / with - and _ so encoded text is easier to use in URLs.
What happens with invalid Base64?
The tool shows a friendly warning and keeps your original input.
Privacy Policy
We do not collect, store, upload, or transmit text entered into this tool.
Terms of Use
ConvertUnlimited is provided as is. Review encoded or decoded output before using it in production systems.