JPG to PNG
Re-encode JPG photos as lossless PNG files.
- Browser-only
- No upload
- No login
- No watermark
- Clear instantly
- Open-source engines
Drop files here
or use the buttons below · .jpg, .jpeg
Your file stays on this device · conversion runs locally in your browser
Deep dive
What is JPG to PNG?
JPG to PNG re-encodes JPEG photos as PNG images. PNG uses lossless compression and supports transparency, so it is the right format when you plan to edit the image further or need a crisp copy without JPEG artefacts.
FormatSwitch converts JPGs to PNG in your browser using the Canvas API. Because there is no upload, batch conversion of hundreds of images is limited only by your device's memory.
When to use it
- Make a lossless copy of a JPG before editing.
- Prepare an image for a design tool that prefers PNG.
- Convert web-optimised JPGs into a print-friendly format.
How to use it safely without uploading
Drop your JPG files and press Convert. The tool encodes PNGs locally, and you can download them one by one or as a ZIP.
Browser-based vs server-based conversion
Most online converters upload your files to their servers, process them there, and then let you download the result. That means your file exists on someone else's computer, often in logs and backups, sometimes indefinitely. FormatSwitch is different: every conversion runs on your device using WebAssembly and the browser's built-in Canvas and PDF engines. Your file never leaves your computer, so there is nothing to leak, nothing to subpoena, and nothing to trust us on — the code that does the work is running right in your tab.
FAQ
JPG to PNG — questions people ask
- Are files uploaded?
- No. Files are processed entirely in your browser using WebAssembly and the Canvas API. Nothing is uploaded to a server, and no copy is kept once you close or refresh the tab.
- Does the PNG add transparency?
- No — JPGs have no transparency to begin with, so the PNG is opaque. Use Remove Background if you need a transparent PNG.
- Any watermark?
- Never. FormatSwitch adds no watermark, logo, or quality cap to your output — the file you download is only what your browser produced.
- Does it work on mobile?
- Yes. Every tool runs on modern iOS Safari and Android Chrome. Very large files may be slower on mobile because of tighter memory limits.
- Are files stored anywhere?
- No. Files live only in your browser's memory (JavaScript heap). They disappear when you clear the queue, refresh, or close the tab. There is no server, no database, no log.
- Do the PNGs keep the original filename?
- Yes. Each output keeps the original filename with a short suffix (for example `-compressed` or `-converted`) so a whole folder of files stays recognisable after conversion.