Base64 Encoder
Encode Base64 correctly for safe use in code and URLs.
Workspace
ReadyInput
Result
That input can’t be decoded
The string is not valid Base64. Check for missing characters or padding.
Free online Base64 Encoder
Encode Base64 correctly for safe use in code and URLs. The Tools4U Base64 Encoder is part of our Security & Privacy collection of Encoding utilities. It works online in any modern browser — no download, no sign-up and no file upload, so your data never leaves your device.
How to use
Using Base64 Encoder in three steps
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1
Add your input
Paste text, drop a file, or type directly into the workspace.
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2
Run the tool
Choose the options you need and press the action button.
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3
Copy or download
Take the result with one click — nothing is stored anywhere.
Features
Why people use this tool
Instant results
Everything runs locally, so results appear as you type.
Privacy-first
Your input never leaves the browser. No uploads, no logs.
Handles big inputs
Comfortable with large files and long documents.
Always free
No account, no limits, no watermark on results.
FAQ
Frequently asked questions
Is Base64 Encoder free to use?
Is my data uploaded to a server when I use Base64 Encoder?
Can I use Base64 Encoder on mobile?
Do I need to install any software to use Base64 Encoder?
Keep going
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