Raw Base64 rejected
Some decoders require a `data:` prefix.
Fix: This tool works without the prefix; magic bytes are sniffed to detect the source format.
Base64 to PNG Converter
Decode Base64 images to PNG with transparency preserved and download the result — all in your browser
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What is Base64 to PNG Converter
Written by Giorgos Kostas. Last reviewed:
A Base64 data URL is a text-safe encoding of a binary image. Decoding it restores the original bytes so you can download them as a file.
Base64 to PNG Converter accepts a data URL or raw Base64, auto-detects the source format, re-encodes via canvas when needed, and produces a PNG with transparency preserved.
Why use it
- Convert a JPEG/WebP data URL into a lossless PNG.
- Recover an image stored as a Base64 field in an API response.
- Keep alpha transparency when the source format supports it.
- Runs entirely in your browser — nothing is uploaded.
Features
- Auto-detect source format
- Lossless PNG output
- Transparency preserved
- Canvas-based re-encoding
- Decoded PNG preview before download
- PNG decoded on-device
How to use Base64 to PNG Converter
- Paste Base64. Paste a data URL or raw Base64 string.
- Decode. Click Decode to PNG — the preview appears instantly.
- Download. Click Download PNG to save the file.
Example (before/after)
Base64 data URL
data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2w…
Downloaded PNG
base64-to-png.png (binary, 42 KB, lossless)
Common errors
Whitespace in the input
Copy-paste sometimes introduces stray newlines or spaces that break decoding.
Fix: Whitespace is stripped automatically — just paste and click Decode.
FAQ
Is the output lossless?
Yes. The canvas re-encoding path produces a lossless PNG regardless of the input format.
Is my data uploaded?
No. Decoding and encoding happen entirely in your browser.
Can I paste a raw Base64 without the prefix?
Yes. The tool sniffs PNG/JPEG/GIF/WebP from the first few bytes.
Is transparency preserved?
Yes when the source supports alpha (PNG, WebP). JPEG sources are treated as opaque.
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Related decoders and image tools: You can also browse the full Image Tools category for more options.
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