JPG to PNG Converter
Use the CaseSwitch JPG to PNG Converter to decode a JPEG and re-encode it as PNG entirely in your browser. This does not restore lost detail — it stores the decoded pixels in a lossless container. Nothing is uploaded.
Written by the CaseSwitch editorial team. We maintain these tools in the browser so drafts, keys, and images stay on your device.
Last reviewed: 23 July 2026
Images are converted in your browser with the Canvas API. Nothing is uploaded.
Drag and drop a JPG here, or choose a file
Examples
CMS requires PNG
Input
hero.jpg (photo)
Output
hero.png · larger file, same visible JPEG artifacts
No transparency invented
Input
product.jpg
Output
product.png · fully opaque pixels
Screenshot already JPEG
Input
slack-export.jpg
Output
slack-export.png · ringing around text preserved, size up
EXIF note
Input
camera.jpg with GPS EXIF
Output
camera.png · metadata typically stripped by canvas export
Wrong expectation
Input
want fewer JPEG blocks
Output
PNG will not remove them — keep or restore from original
How to use
- Choose or drop a JPG/JPEG file.
- Convert — there is no quality control on PNG export.
- Download the `.png` and keep the JPEG if it was your smaller master photo.
What this tool is for
Satisfy toolchains and CMS rules that only accept PNG, or hand a JPEG-derived bitmap to an editor that prefers PNG. File size usually grows. No alpha appears because JPEG never had one — the PNG will be opaque.
How it works
The JPG is validated, drawn to a canvas at intrinsic size, and exported with `canvas.toBlob('image/png')`. There is no quality slider because PNG output from canvas is lossless relative to the decoded bitmap. Canvas re-encode typically drops EXIF/GPS.
When to use it
A CMS that rejects JPEG, a print tool that wants PNG, and pipelines that expect a PNG extension even when content started as a photo.
When not to use it
Trying to “fix” a blocky JPEG — you need the original or specialized restoration, not a format wrap. Avoid round-tripping JPG → PNG → JPG for fun; each JPEG pass can add generation loss.
How it compares to related tools
JPG to WebP is usually the shrink path for the web. PNG to JPG flattens alpha going the other way. WebP to PNG is the sibling decode for WebP sources.
Common mistakes
Expecting transparency to appear, expecting artifact removal, and deleting the original JPEG thinking PNG somehow upgraded it.
Lossless relative to decoded pixels
PNG stores what the browser decoded from JPEG without further lossy compression. Information JPEG already discarded cannot return. That is why “fixing” via PNG is a myth.
Local Canvas processing
All work stays on-device via Canvas. CaseSwitch does not see your photo. Prefer this over anonymous upload converters when the image is personal or unpublished.
Frequently asked questions
Will this remove JPEG artifacts?+
No. PNG stores them faithfully. Artifact removal needs specialized tools.
Why is the PNG bigger?+
PNG is lossless relative to decoded pixels. JPEG had already discarded information; PNG then stores what is left without JPEG’s compression.
Is the image uploaded?+
No. Conversion runs in your browser.
Does PNG add transparency?+
Not meaningfully — source JPEG pixels are opaque. You would need manual masking afterward.
Is there a quality slider?+
No for PNG output. Quality applies to JPEG/WebP exports on other tools.
Max file size?+
Client-side validation enforces a maximum (on the order of 15 MB). Resize huge camera files first if needed.
Are images uploaded to a server?+
No. Image tools use the Canvas API in your browser. Files stay on your device and object URLs are revoked after use.
Related tools
PNG to JPG Converter
Photos that were saved as PNG for no good reason, email attachments with size limits, and web photos that do not need transparency.
JPG to WebP Converter
Web performance passes, replacing heavy JPG heroes, and building `<picture>` experiments when you still keep a JPEG fallback elsewhere.
WebP to PNG Converter
Opening a WebP in an older editor, handing files to a print vendor that wants PNG, and keeping transparency for further design work.
PNG to WebP Converter
Web performance for graphics, replacing heavy PNGs on marketing pages, and stickers that need a transparent background.
WebP to JPG Converter
Printers and CMS boxes that want JPEG, Outlook-era workflows, and sharing a photo with someone whose apps lack WebP.