JPG to PNG

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This is one of several image tools. For the full list of utilities, see All tools.

Converting a JPG to a PNG is technically simple but conceptually wasteful in many cases, and that is exactly why so many people get confused about when to do it. PNG is a lossless format designed for graphics with sharp edges, transparency, and few colours; JPG is a lossy format designed for photographs. Converting a JPG to a PNG does not restore lost detail (the lossy compression already happened); it just locks in the existing pixels in a much larger file.

That said, there are real reasons to convert JPG to PNG: when a downstream tool requires PNG specifically (some logo-builders, some print services, some legacy CMS upload widgets), when you want to add transparency to a photo by painting out a background, or when archiving a JPG and you want to ensure no further lossy re-encoding happens.

The ToolzPedia JPG to PNG converter runs entirely in your browser. It decodes the JPG using the Canvas API and re-encodes as PNG, preserving every pixel exactly. The output PNG will be 3 to 10× larger than the JPG; that is a property of the format, not a bug.

Use the tool edit

🔁
Drop JPG files here or click to upload

Multiple JPGs allowed · Converted to lossless PNG

How to use JPG to PNG edit

Follow these steps to use the tool:

  1. Drop your JPG files

    Multiple files at once is fine; they convert in parallel.

  2. Click Convert

    The conversion is near-instant.

  3. Download

    Each file gets its own download button. The output filename keeps the original name with a <code>.png</code> extension.

Frequently asked questions edit

No. PNG is lossless, but the source JPG already lost detail. The PNG preserves the existing JPG quality exactly.
PNG is lossless; JPG is lossy. For photographs, lossless storage is inherently larger.
No. Conversion happens entirely in your browser.
Yes, drop multiple files at once.
No, EXIF metadata is stripped during conversion (a privacy-friendly default).
PNG supports transparency, but the source JPG had no transparency, so the PNG will be fully opaque. To add transparency, use the Remove Background tool after conversion.

Use cases edit

Tools that require PNG specifically

Some logo generators, design tools, and print-on-demand services accept only PNG. Conversion is the path of least resistance.

Adding transparency to a photo

You cannot make a JPG transparent (no alpha channel), but you can convert to PNG and then erase a background to produce a transparent version.

Stopping further lossy re-encoding

If you plan to edit a JPG repeatedly and re-save, convert to PNG first. PNG is lossless, so subsequent saves do not degrade quality.

Archiving JPGs for long-term storage

PNG is a stable, well-documented format. Some archivists prefer it over JPG for important documents.

Screenshots saved as JPG by mistake

Some screenshot tools default to JPG; converting to PNG locks in the existing quality and matches the conventional format for screenshots.

How it works edit

The Canvas API decodes the JPG into an off-screen image surface, then re-encodes via canvas.toBlob() with the MIME type image/png. PNG is a lossless format that uses DEFLATE compression on filtered pixel data; the encoder produces a compact-as-possible PNG given the source pixels.

Because PNG is lossless and JPG was lossy, no information is recovered, the JPEG artefacts that were already baked into the source are preserved exactly in the PNG. The conversion is purely a format change, not a quality improvement.

For images with many colours (like photographs), the resulting PNG is typically 3 to 10× larger than the source JPG. For images with few colours (icons, line art), the PNG can be smaller than the JPG, though if you have an icon as a JPG, you should question why.

Tips and best practices edit

  • If you only need PNG for transparency, convert and then use the Remove Background tool to make the subject transparent in one workflow.
  • For web use, do not convert JPG photos to PNG just because PNG sounds "better", JPG is the right format for photos.
  • If you need a smaller PNG, use a PNG-specific optimiser after conversion (the Compress Image tool handles this).

Common mistakes edit

Expecting better quality

PNG cannot recover detail lost to JPEG compression. Converting changes the format, not the content.

Using PNG for photographs on a website

A 5 MB photo PNG slows page load dramatically. Use JPG or WebP for photos.

Your files stay private. This tool processes files entirely in your browser using JavaScript. No file is uploaded to any server.

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See also edit