Base64 image decoder

Base64 to PNG Converter

Decode a Base64 PNG string, data URL or embedded code snippet into a transparent PNG preview. Inspect the image, copy a reusable data URL and download the result locally.

Input

Paste Base64 PNG

Auto detect

Paste raw Base64, a data:image/png URL, or a snippet from HTML, CSS, JSON, SVG, email or JavaScript. FileFlow extracts the image data automatically.

Drop a .txt or .json file here. Your image data stays in this browser.

Up to 10 MB
Output

PNG preview

Waiting for input
Your PNG will appear here

Convert a Base64 PNG to preview transparency, dimensions and file size before downloading.

Transparent backgroundLossless imageLocal preview
100% Private

All conversions happen locally in your browser.

Super Fast

Instant conversion with zero waiting time.

Secure

Your data never leaves your device.

Developer Friendly

Perfect for developers, designers and testers.

Converter guide

Base64 to PNG Converter Guide

Use this Base64 to PNG converter to decode PNG image data from a raw Base64 string or data:image/png URL. It is useful for checking transparent graphics, screenshots, icons and UI assets embedded in code or API payloads.

The decoded PNG preview is generated in your browser. Your Base64 input is not uploaded, and recent results store metadata only for browser performance.

The decoded PNG preview is generated in your browser. Your Base64 input is not uploaded, and recent results store metadata only for browser performance.

How to convert Base64 to PNG

  1. Paste your Base64 PNG string or data:image/png URL into the input field.
  2. Click “Convert Base64 to PNG”.
  3. Preview the PNG image, check metadata and download the result.

Common use cases

  • Decode transparent PNG logos from APIs.
  • Preview PNG screenshots embedded in JSON.
  • Check Base64 PNG icons from HTML or CSS.
  • Extract PNG data URLs from SVG or email templates.
Related Base64 workflows

Base64 image conversion options

Base64 to PNG

Paste a Base64 PNG string or data:image/png URL to preview transparent graphics, screenshots and UI assets before downloading.

Base64 to JPG

Decode Base64 JPG or JPEG data to check photos, API image payloads and compressed web images quickly.

Base64 to JPEG

Decode Base64 JPEG data URLs for photos and compressed images from APIs, HTML, CSS and JSON payloads.

Base64 image viewer

Use the converter as a Base64 image viewer to inspect embedded images from HTML, CSS, JSON, SVG and email snippets.

Three simple steps

How it works

01

Paste or drop

Paste Base64, a data URL, or drop a text file into the converter.

02

Decode locally

The browser decodes the string without uploading your data.

03

Inspect and download

Preview the image, check metadata, copy snippets, and download the file.

Browser image support

Supported formats

JPGJPEGPNGGIFBMPTIFFSVGWEBPAVIFICO
Format comparison

Base64 vs image formats

MethodSizeSpeedBest use
Base64About +33%FastSmall embedded icons, API payloads, email templates
PNGNormalFastTransparent graphics, screenshots, UI assets
JPGSmallFastPhotos and compressed web images
Common questions

Base64 to PNG FAQ

Is my Base64 image uploaded?

No. The conversion runs locally in your browser. Your Base64 string, data URL and generated image are not uploaded to a server for decoding.

How do I convert Base64 to PNG?

Paste a Base64 PNG string or data:image/png URL, click Convert Base64 to PNG, then preview and download the decoded PNG image.

Can I preview a Base64 image without downloading it?

Yes. After conversion, the image preview appears in the result card so you can inspect it before downloading or copying a data URL.

Can I paste HTML, CSS, JSON or SVG snippets?

Yes. The auto-detect helper can extract Base64 image data from data URLs, image tags, CSS background-image rules, JSON payloads, SVG image references and similar snippets.

Is Base64 secure?

Base64 is encoding, not encryption. Anyone can decode it, so do not use Base64 to hide private data.

Does Base64 increase image size?

Yes. Base64 usually makes binary image data about one third larger than the original file.

What is the maximum Base64 size?

This tool is designed for browser-based conversion and supports practical image sizes. Very large strings may be slow because browsers need memory to decode and preview them.

PNG vs JPG Base64: what should I use?

Use PNG for transparency and sharp graphics. Use JPG or JPEG for photos and smaller file size.