Base64URL
Encode or decode URL-safe Base64 (base64url, as used in JWTs). Done in your browser.
Runs in your browser — your file never leaves your deviceFrequently asked questions
Is Base64URL free to use?
Yes — Base64URL is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.
Are my files uploaded or stored anywhere?
No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.
Do I need to install anything or create an account?
No installation and no account needed. Base64URL works on any modern browser — Windows, Mac, Linux, Android and iPhone.
How do I use Base64URL?
Open the tool, add your file (or paste your content), adjust any options, then press “Convert”. Your result is ready to download in seconds.
Related tools
Current Timestamp
Get the current time in every format.
List to JSON
Turn lines into a JSON array.
Remove Blank Lines
Delete empty lines from text.
Excel Column Converter
Column letter ↔ number (A ↔ 1, AA ↔ 27).
Ad Copy Generator
3 ready-to-run ad variations.
Contacts (VCF) to CSV
Turn a contacts export into a spreadsheet.