What this tool does
Encode Unicode text to Base64 or decode Base64 back to readable text with selected inputs processed locally in your browser.
Privacy behavior
Selected file contents are processed locally in your browser for supported workflows. This privacy build does not intentionally load ads, analytics, remote fonts, or third-party runtime scripts.
Supported workflow
Base64 is commonly used to represent text or binary data in APIs, embeds, tokens, and data transfer workflows where plain text transport is needed.
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 sent to ConvertUnlimited servers?
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
Privacy build: This build removes ads, analytics, remote fonts, runtime CDN scripts, and file-operation telemetry. Selected files are processed in the browser using local JavaScript and browser APIs.
ConvertUnlimited does not provide a server-side upload endpoint for this Base64 encoding and decoding flow. Text input is processed locally in your browser.
Terms of Use
ConvertUnlimited is provided as is. Review encoded or decoded output before using it in production systems.