Base64 Encoder and Decoder
Use Base64 Encoder and Decoder
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About this tool
Encode or decode text and files as Base64 locally in your browser, with image preview and quick copy tools.
- 100% free with no usage limits
- No sign-up or login required
- Runs right in your browser
- Privacy-friendly and fast to use
Docs
Encode or decode text and files as Base64 locally in your browser, with image preview and quick copy tools.
Core Features
- Text to Base64 encoding.
- Base64 to text decoding.
- File upload and automatic Data URL/Base64 conversion.
- Image preview when data represents an image.
- One-click copy for output content.
- Output download as text file.
- 100% local processing in the browser.
How to Use
- Select mode: Encode or Decode.
- Paste input text/Base64/Data URL, or upload a file for conversion.
- Run conversion and review output immediately.
- Copy or download the result, and check image preview if available.
Typical Scenarios
- Convert images or SVG assets to Base64 for inline frontend usage.
- Decode Base64 payloads from APIs during troubleshooting.
- Prepare Base64 text for transport, signature workflows, or storage.
- Generate Data URL strings quickly for mockups and prototyping.
Notes
- Decoding requires valid Base64 input.
- Very large files may consume significant browser memory.
- Preview is shown only when content is recognized as image data.
Last verified: 2026-04-03
Source: marcrobledo/base64-converter
FAQ
Is it free?
Yes, completely free. No signup, no limits.
Encode & decode?
Yes. Encode text/files to Base64, or decode back.
Will data be uploaded?
No. All local; nothing leaves your computer.
What input types?
Plain text and file upload; handles images, docs, etc.
Size limits?
Large files may affect performance. ≤10MB recommended.
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