Convert JPG to PNG
Convert JPG/JPEG images to lossless PNG format. While JPG uses lossy compression that degrades slightly each time you re-save, converting to PNG freezes the image in its current state with zero further quality loss. PNG also supports transparency, which JPG does not. Compresso handles the conversion entirely in your browser — your images are never uploaded to any server.
Drop images here or click to upload
JPG — up to 50MB each
Convert JPG to lossless PNG format instantly
Prevents further quality degradation from re-saving
PNG output supports transparency for compositing workflows
Batch convert multiple JPG files simultaneously
Resize dimensions while converting
Perfect for images that need further editing
Download individually or as a ZIP archive
100% private — images never leave your device
Understanding JPG to PNG Conversion
JPG and PNG represent fundamentally different approaches to image storage. JPG prioritizes small file sizes through lossy compression — it discards data the human eye is less sensitive to. PNG prioritizes perfect reproduction through lossless compression — every pixel is preserved exactly.
The Generational Loss Problem
Every time you open a JPG, edit it, and save it as JPG again, additional quality is lost. This is called generational loss. After several cycles of edit-and-save, the degradation becomes visible — especially around text, edges, and areas of solid color. Converting to PNG breaks this cycle by storing the image losslessly, making it safe for unlimited edits.
Related Tools
- Convert PNG to JPG — the reverse conversion for smaller files
- Convert JPG to WebP — modern format for web use
- Compress JPG — optimize JPGs without converting
- Compress PNG — optimize your converted PNGs
- Bulk Compress — process many files at once
Frequently Asked Questions
Why convert JPG to PNG?
Three main reasons: 1) Prevent further quality loss — every time you edit and re-save a JPG, it degrades slightly (generational loss). Converting to PNG stops this cycle. 2) Add transparency support — PNG supports alpha channel transparency, which is essential for logos, overlays, and compositing. 3) Preserve sharp edges — PNG doesn't create compression artifacts around text and geometric shapes like JPG does.
Will converting JPG to PNG improve quality?
Converting won't restore quality that was already lost during original JPG compression — you can't un-compress data that was discarded. However, it prevents any further degradation. The image is preserved pixel-for-pixel in lossless PNG format. Think of it as putting a damaged photo in a protective case — it won't fix the damage, but it prevents more.
Is PNG larger than JPG?
Yes, significantly. PNG uses lossless compression which preserves every pixel exactly, resulting in files that are typically 3-10x larger than JPG for photographs. A 500KB JPG might become 3-5MB as PNG. The tradeoff is perfect quality preservation — every pixel is identical to the input.
When should I use PNG instead of JPG?
Use PNG when: the image needs transparency, it contains sharp text or UI elements, it's a source file for further editing, you need pixel-perfect accuracy (medical/scientific images), or it has few colors (logos, icons). Use JPG when: file size matters, it's a photograph, and it's a final output that won't be re-edited.
Can I batch convert JPGs to PNG?
Yes! Upload multiple JPG files and convert them all to PNG simultaneously. Download individually or as a ZIP archive. This is useful when you need to prepare a batch of photos for an editing workflow that requires lossless source files.
Is the conversion free and private?
Completely free with no limits. All conversion happens locally in your browser — your images never leave your device. No account, no watermarks, no daily restrictions.
Does JPG to PNG conversion add transparency?
The converted PNG file supports transparency, but the conversion itself doesn't make any part of the image transparent. The entire image will have a fully opaque alpha channel. To create transparency, you'd need to edit the PNG in an image editor (Photoshop, GIMP, Canva) to remove specific areas.
Should I convert JPG to PNG or WebP?
For editing and compositing: PNG (lossless, universal software support). For web use: WebP (smaller files, transparency support). For archival: PNG (lossless, widely supported, well-documented format). If you need a lossless format that works everywhere, PNG is the safe choice.
Last updated: March 2026