Input is rejected
remove surrounding quotes, confirm the Standard/URL-safe setting, check padding and verify that the value was not truncated.
Convert Base64 to image
Decode a raw Base64 string or image data URL, preview the restored image and download the resulting file with MIME-aware handling.
Base64 utility · Fast, exact Base64 conversion
What this tool does
Paste raw Base64 or a complete image data URL. The tool decodes the byte stream, uses MIME information when available, displays a preview and prepares a downloadable image.
Convert now
Paste a Base64 payload to preview the decoded image.
How to convert Base64 to image
Paste a raw Base64 image payload or a complete image data URL.
Keep Decode selected and choose Standard or URL-safe Base64 when the control is available.
Review the output and byte information, then copy or download the result.
Output and format behavior
A complete image data URL includes a MIME type. Raw Base64 contains neither a filename nor MIME metadata, so use the expected image type when previewing or saving the restored bytes.
A full data:image/...;base64, value includes MIME context. Raw Base64 does not contain the original filename, so use the expected image type when saving the restored bytes.
Expert tip
When the input is raw Base64, record the known MIME separately before download rather than inferring from the first successful preview.
When this is useful
Typical workflows include:
- Recover an image for visual inspection when a Base64 payload appears in logs, JSON or a data URL.
- Inspect or compare a small payload when the original representation is opaque or difficult to paste safely.
- Create a reproducible test fixture without manually rewriting the source bytes.
Limitations and safety
Important constraints:
- Base64 normally adds about one third to the byte payload, before any data-URL prefix or surrounding markup.
- Base64 is reversible encoding, not encryption. Anyone who receives the string can decode the original bytes.
- A valid payload is restored to image bytes without resizing or recompression. Raw Base64 still does not restore the original filename or MIME metadata.
Troubleshooting
No image preview appears
verify that the payload is complete and, when using a data URL, that the MIME prefix matches the actual image.
The tab becomes slow
large inputs can consume substantial browser memory, and data URLs can exceed limits in receiving systems. Try a smaller input or use a file-based transfer workflow.
Frequently asked questions
What exactly is preserved?
A complete image data URL includes a MIME type. Raw Base64 contains neither a filename nor MIME metadata, so use the expected image type when previewing or saving the restored bytes.
Does Base64 change image quality?
Decoding a valid Base64 payload restores the same image bytes without resizing or recompression. Raw Base64 still does not carry the original filename or MIME metadata.
Can I paste Base64 without a data-URL prefix?
Yes. Raw Base64 contains neither MIME nor a filename, so use the expected image type when previewing or saving the restored bytes.
Why is my Base64 input rejected?
Check for unsupported characters, a Standard/Base64URL mismatch, damaged padding or a truncated value. Also remove surrounding quotes that are not part of the payload.
Related Base64 tools
Continue with the localized page that matches the next operation:
Paste your input above, run the conversion, and copy or download the result.