Convert JPG to PNG — lossless, fast, 100% in your browser
Drop a JPG below and get a pixel-perfect PNG in a single click. The conversion runs entirely on your device — your files are never uploaded anywhere.
Your file is processed entirely in your browser. Nothing is uploaded.
Converting a JPG to PNG preserves every pixel of your JPG exactly as it is, but it is worth understanding what this conversion actually does and does not do. PNG is a lossless format, meaning once your image is saved as PNG, every subsequent save preserves 100 percent of the quality. JPG, on the other hand, is lossy: a small amount of visual information is thrown away on every save. If you plan to edit an image multiple times — crop it, retouch it, color-correct it — converting to PNG on the first save is a smart way to freeze the current quality and avoid generational loss from repeated JPG re-saves.
However, converting JPG to PNG does not magically restore the quality that JPG already discarded. The compression artifacts, the softened edges, the subtle color quantization are all baked into the pixels of the source JPG, and PNG simply preserves them without adding new damage. The FileShrink JPG to PNG converter runs entirely in your browser through the HTML5 Canvas API. No upload, no server, no logging. Drop a JPG, wait a moment, and download the PNG.
How to convert JPG to PNG in 4 steps
- 1
Select your JPG file
Drop the file into the dropzone above, or click to browse. Any JPG your device can open is accepted, regardless of size.
- 2
Wait for in-browser conversion
The Canvas API reads your JPG and re-encodes the pixels as a lossless PNG. On a modern laptop, even large photos finish in well under a second.
- 3
Compare the file sizes
The result panel shows the original JPG size and the new PNG size. Expect the PNG to be noticeably larger — that is normal for lossless output on photos.
- 4
Download your PNG
Click the download button to save the new PNG. Your original JPG is untouched and nothing was sent to any server.
JPG vs PNG: which format should you pick?
JPG, also known as JPEG, is a lossy format built for photographs. It compresses photos 10 to 20 times smaller than an uncompressed bitmap while preserving perceptual quality, but introduces visible artifacts on text, sharp edges, and flat color regions — commonly called ringing and blocking. PNG uses lossless compression, preserving every pixel exactly, and supports transparency through an alpha channel (JPG does not). For photographs, PNG files typically land 3 to 10 times larger than the JPG equivalent. The practical rule is simple: if you need to preserve quality for editing or the image has sharp edges and flat colors, PNG is the right pick. If you need the smallest file size for a photo intended only for viewing, JPG wins.
When should you convert JPG to PNG?
Freezing quality before editing
If you plan to crop, retouch, or color-correct a JPG multiple times, save it as PNG first. This avoids cumulative generational loss from repeated JPG re-encoding.
Preparing for transparency work
PNG is the minimum starting point when you want to cut out a background or add alpha transparency. You cannot add transparency to a JPG itself.
Uploading to PNG-only platforms
Some document editors, specialized design tools, and logo-submission portals require PNG regardless of the source format.
Small-graphic printing
Certain print workflows prefer PNG for small graphics and logos to avoid the subtle banding that JPG can introduce on flat color regions.
Frequently asked questions
- Will converting JPG to PNG improve the quality?
- No. PNG is a lossless format, so it preserves the JPG exactly as it is — compression artifacts and all. Converting does not recover information that was discarded during the original JPG compression. What PNG does offer is a guarantee that no further quality degradation will happen on subsequent saves or edits.
- Why is my PNG so much larger than the original JPG?
- Because JPG is extremely efficient at compressing photographs — often 10 to 20 times smaller than lossless formats. PNG compression, while entirely lossless, cannot match JPG’s ratio on photographic content. Expect a PNG that is 3 to 10 times bigger than the source JPG.
- Does my PNG have a transparent background?
- No. JPG does not carry transparency information — every pixel of a JPG is fully opaque. Converting to PNG preserves that full opacity. If you need actual transparency, you will have to cut out the background separately in an image editor.
- Can I convert multiple JPGs at once?
- Yes. Drag a whole selection of JPGs onto the dropzone, or pick several at once when browsing — up to 50 files per batch. Conversion runs file by file with a live progress counter, every finished PNG gets its own download button immediately, and "Download all" packages them into one ZIP. Everything still happens locally in your browser, so a 50-file batch uploads exactly as much data as a single file: none.
- Does FileShrink keep a copy of my file?
- No. The entire conversion happens in your browser using the HTML5 Canvas API. No file is ever uploaded, stored, or logged. You can verify this by disconnecting your network once the page is loaded — the tool keeps working.