Base64 to JPG Converter

Decode a Base64 data URL or string and download it as a JPG image — all client-side

Paste a Base64 data URL or raw Base64 and download the decoded image as a JPG file.

Re-encodes through a browser canvas at ~92% quality.

Base64 data URL or raw Base64

What is Base64 to JPG Converter

Last reviewed: April 18, 2026

Base64 is a binary-to-text encoding that represents arbitrary data using 64 printable ASCII characters, commonly used to embed binary blobs in JSON, URLs, and emails.

A Base64 string starting with `data:image/…;base64,` is a text representation of a binary image. Decoding it yields the original bytes ready to be saved as a file.

Base64 to JPG Converter accepts either a full data URL or a raw Base64 payload, auto-detects the source format, and re-encodes it to a JPG you can download directly.

Why use it

Convert a PNG/WebP data URL you have on hand into a universally compatible JPG.
Flatten transparency to white so the output looks right on any background.
Recover a JPEG from an API response that returns only a Base64 field.
100% browser-based — the string never leaves your machine.

Features

Auto-detect PNG/JPEG/GIF/WebP
Canvas-based re-encoding
Transparency flattened to white
~92% JPEG quality
Decoded JPEG preview before download
JPEG decoded on-device

How to use Base64 to JPG Converter

Paste Base64. Paste a `data:image/…;base64,…` string or raw Base64.
Decode. Click Decode to JPG — the preview and size appear instantly.
Download. Click Download JPG to save the file.

Example (before/after)

Base64 data URL

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA…

Downloaded JPG

base64-to-jpg.jpg (binary, 18 KB, 92% quality)

Common errors

Invalid Base64 padding

Truncating the trailing `=` characters breaks the decoder.

Fix: Include the full Base64 payload with any `=` padding that was present in the source.

Transparent pixels look wrong

JPEG has no alpha channel, so transparent pixels become black or garbled.

Fix: This tool automatically fills transparent pixels with white before JPEG encoding.

FAQ

Does it upload my data?

No. Decoding and canvas re-encoding happen entirely in your browser.

What quality is the output?

The JPEG is re-encoded at ~92% quality, which gives a good balance between file size and fidelity.

Can I decode a raw Base64 without the `data:` prefix?

Yes. The tool auto-detects PNG/JPEG/GIF/WebP via magic bytes and works without the prefix.

Does it preserve transparency?

JPEG does not support alpha, so transparent pixels are flattened to white during conversion.

Related tools

Related decoders and image tools: You can also browse the full Image Tools category for more options.

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