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How your files are processed
Files are uploaded and processed on our servers, then made available for download.
What this tool does
JPEG is decoded; PNG stores the result losslessly. JPEG never contained alpha—PNG alpha starts empty or from explicit fill.
File size often increases versus JPEG for photo-like content.
- JPEG family — Raster stores pixels per subsampling and compression scheme chosen at encode time.
- PNG family — PNG output: lossless DEFLATE; full alpha and grayscale modes.
- Encode traits — Raster exports fix dimensions, subsampling, and ICC embedding per encoder—vectors rasterize to one pixel grid.
How to convert JPG to PNG?
- Choose file — upload a JPEG file that matches this page (allowed extensions apply).
- Convert to PNG — lock the target format if needed, then start the job and wait for status updates.
- Download — grab the finished file from your job link before the retention window ends.
Why convert JPG to PNG?
Each hop trades smaller files against visible defects; switching formats can trade alpha, animation, or HDR side data against simpler decode surfaces.
PNG buys lossless headroom after JPEG already discarded frequencies—you pay bytes without reclaiming lost texture.
Vectors versus rasters trade infinite zoom against predictable pixel weight—prefer PNG when bitmap semantics matter more than editable paths.
Common reasons to convert JPG to PNG
- Sync PNG into DSM when Sketch stayed JPG but the style guide expects PNG.
- Emit PNG from GitLab CI before Slack when reviewers diff JPG screenshots.
- Serve PNG from next/image when builds optimize assets but archives stay JPG.
- Stage PNG on Marketing Cloud when ZIP packs must match hosted filenames.
- Point Imgix URLs at PNG when CDNs rewrite JPG masters already in S3 buckets.
Will converting JPG to PNG affect quality or file size?
PNG preserves whatever pixels remain after JPEG decoded them.
Discarded JPEG detail cannot return; files often grow and JPEG still never contained transparency.
JPG vs PNG
JPEG (JPG)
JPEG uses lossy compression for photos and cannot store transparency. Files stay small, but each re-save can add artifacts, so keep a clean master when you expect more edits. It remains the everyday choice for web galleries and email attachments.
PNG (PNG)
PNG compresses bitmaps without throwing pixels away and supports smooth transparency. UI shots, logos, and crisp diagrams often ship as PNG. Photo-sized PNGs are usually heavier than JPEG because nothing is discarded.
JPEG to PNG moves shots into Photoshop layers and slide overlays where lossless pixels beat tiny mail attachments.
Troubleshooting
- Lossy recompression: blocking, ringing, and banding show first on text, edges, and skies—inspect at 100% zoom.
- Alpha: formats without an alpha channel (JPEG, most HEIC stills) cannot produce real transparency in the output unless you supply it elsewhere.
- Dimensions and DPI: raster outputs fixed pixel grids—upscaling later softens detail; embedded ICC profiles may shift colors across viewers.
- Decode support: older viewers may lack PNG decoders (AVIF, WebP); verify the destination stack.
- Upload fails or stalls: refresh the page, try a different browser, or disable strict content blockers for this session.