Local browser image processing
JPG to PNG Converter
Convert JPG images to lossless PNG for free, ready for editing and re-saving. Fast, private, and processed entirely in your browser.
No files selected
Your files will be listed here once you add them.
Nothing to configure
PNG is lossless, so there is no quality dial to set. Check the images on the left, then convert.
Processed locally in your browserYour files never leave this device. No uploads. No registration.
Next step
Carry this file straight into another tool. It stays in your browser.
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Check it yourself in DevTools — the method, in five steps.
Understand the output
What This Tool Produces
- A lossless .png copy
- Unchanged decoded dimensions
- Measured output size
- Batch ZIP download
How to Use This Tool
- Add JPG filesChoose JPG or JPEG images that a workflow needs as PNG.
- ConvertNo quality setting is needed because PNG output is lossless.
- Review file sizeExpect photographic PNG files to be larger, then download only if PNG is useful for the next step.
Controls and Method
Lossless output
PNG uses lossless compression here, so there is no quality slider. The decoded JPEG image is stored without another lossy stage.
PNG Will Not Undo JPEG
Converting to PNG freezes the artifacts already baked into the JPG; it does not recover them, and it does not add transparency to a photo that never had any. If transparency is what you are after, remove the background — that creates the alpha channel this conversion cannot.
Expect the file to grow, often several times over. Compressing the PNG or resizing it offsets that, and WebP offers transparency at a fraction of PNG weight if the destination supports it.
Why PNG Cannot Restore JPEG Quality
JPEG decoding produces the pixels currently stored in the file, including any blockiness, ringing, or lost texture. PNG can preserve those decoded pixels without further lossy encoding, but it has no information from which to reconstruct the original scene.
Useful Reasons to Convert
- An editor or form requires PNG.
- Several future saves should avoid additional JPEG loss.
- A design workflow will add transparency later.
- A screenshot or composite needs a lossless working copy.
Why the PNG Is Often Larger
Photographs contain many colors and subtle changes. PNG preserves those decoded pixels losslessly, while JPEG was designed to compress photographic detail with controlled loss. A larger PNG is therefore normal and is not evidence of improved detail.
Practical Uses
- Meeting PNG-only input requirements
- Starting a lossless editing workflow
- Preparing for later background removal
- Avoiding another JPEG save during multi-step edits
Important Limitations
- Lost JPEG detail is not restored.
- The PNG is often larger than the source JPG.
- Transparency is not created.
- Source metadata and color profiles are not copied.
Frequently Asked Questions
Does PNG improve JPG quality?
No. It preserves the current decoded pixels losslessly but cannot recover detail already discarded by JPEG.
Will the PNG background be transparent?
No. JPG has no alpha channel, so conversion creates an opaque PNG. Transparency must be added in an editor.
Why is the PNG much larger?
Lossless PNG stores photographic pixels less compactly than lossy JPEG in many cases.
Does the quality slider matter?
There is no quality slider for this page because PNG encoding is lossless.
When should I keep JPG?
Keep JPG for everyday photo sharing and size-sensitive delivery when PNG is not required.