Base64 to Image Converter Online – Decode Base64 to JPG, PNG Instantly Free

Free Online Tool

Base64 to Image Converter

Decode Base64 strings into downloadable images instantly in your browser. Supports Data URI format, auto-detection, PNG/JPG/WebP export, and copy decoded Data URI for direct use. No data leaves your device.

100% Client-Side Instant Decoding No Data Uploaded Auto-Detect Format

All Base64 decoding is performed entirely in your browser. No data is uploaded or stored on any server.

Paste Base64 String

Base64 String *

Supports up to 200,000 characters 0 / 200,000

Decoding Base64

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Initializing...

Image decoded successfully!

Decoded Image

Image preview will appear here after decoding...

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Download & Copy

Output size: —

How To Convert Base64 to Image

1

Paste Your Base64 String

Paste your Base64 string into the input box. You can paste a raw Base64 string or a full Data URI (starting with data:image/...). Use the "Paste from Clipboard" button to quickly paste from another tab.

2

Click Decode to Image

Hit the "Decode to Image" button to start decoding. The tool automatically detects the image format from the Data URI prefix. All processing happens locally in your browser.

3

Preview the Decoded Image

View the decoded image in the preview area above. The output section shows the detected format, original Base64 size, and output file size.

4

Download or Copy

Choose PNG for lossless quality, JPG for smaller file sizes, or WebP for modern web use. Click "Copy Decoded Data URI" to copy the full Data URI to your clipboard for direct use in HTML or CSS.

5

Download the Image

Click the download button to save the image directly to your device. No server involved — the file is generated locally using Canvas API and downloaded via your browser.

Frequently Asked Questions

Base64 is a binary-to-text encoding scheme that represents binary data (like images) as an ASCII string. Every 3 bytes of binary data is converted to 4 ASCII characters, making it safe to embed in text-based formats like HTML, CSS, JSON, XML, and APIs.

You can download the decoded image in three formats: PNG (lossless, best quality), JPG (lossy, smaller files), and WebP (modern, best compression). The original Base64 format is auto-detected from the Data URI prefix when available.

No. The tool auto-detects the format from the prefix. You can paste either a raw Base64 string or a full Data URI like data:image/png;base64,iVBOR.... Both formats work — the prefix is extracted automatically.

It copies the full Data URI string to your clipboard. You can paste it directly into HTML <img src="..."> tags, CSS background-image: url("..."), JavaScript, JSON, or any application that accepts Data URIs. The prefix tells the browser the encoding and image type automatically.

When downloading as JPG or WebP, the browser re-encodes the image, which may produce different file sizes due to compression differences. PNG output is lossless and tends to be larger. Base64 encoding itself adds ~33% overhead, which is normal and unavoidable.

200,000 characters — roughly equivalent to 150 KB of raw Base64 data, which produces images around 100 KB. For very large Base64 strings, processing may take a few seconds in your browser.

Absolutely. Your data never leaves your device. All decoding happens locally in your browser using JavaScript's atob() function. No data is sent to any server, nothing is stored, and no one else can access your data.

The tool reads the MIME type from the Data URI prefix automatically. For example, it recognizes image/jpeg, image/png, image/webp, image/gif, image/bmp, and image/svg+xml. If no prefix is present, it defaults to PNG.

Yes. Upload from your photo library, paste Base64 strings, decode and preview images, and download — all from a mobile browser. The layout stacks vertically on mobile with full-width buttons.

Some Base64 strings from developer tools or logs don't include the Data URI prefix and can be very long, making it hard to select all text in the textarea. The "Paste from Clipboard" button reads from your clipboard and auto-populates the input, handling any length of Base64 string instantly.

Convert Base64 to images instantly — secure, fast, and 100% client-side.

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