QuickMergeImage Converter — JPG, PNG and WebP
Short answer: To convert an image between JPG, PNG and WebP, choose the target format and export a new copy. QuickMerge makes the conversion locally in your browser without uploading the image.
Convert images between JPG, PNG and WebP with an adjustable quality setting, entirely in your browser. PNG to WebP, JPG to PNG, WebP compression and back again — no upload, no account, and the picture never leaves your device.
How do I convert an image between JPG, PNG and WebP?
Drag & drop here
or click to browse
Convert Between JPG, PNG, and WebP
Different jobs want different image formats: JPG for small photos, PNG for sharp graphics and transparency, WebP for the best size-to-quality ratio on the modern web. This tool converts any image to the format you need — PNG to JPG, JPG to WebP, and every other combination — with a quality slider for the lossy formats.
Conversion runs on a canvas in your browser. Everything runs on your device via open-source browser libraries — your file is never uploaded. You can verify it yourself.
Next steps
Related tools
- convert iPhone HEIC photos — a separate format that needs its own decoder.
- turn HEIC photos into a PDF — when the result should be a document rather than image files.
- rename JFIF files losslessly — no re-encoding needed for those.
What to do with the result
- compress the converted file — PNG output in particular is often large.
- strip EXIF from the result — conversion can carry metadata across.
Browse all image tools, or see every QuickMerge tool.
No completed size benchmark is published for this tool. See measurement coverage and limitations; stated upload limits are application guards, not tested device capacity.
Frequently Asked Questions
JPG for photographs, PNG when you need crisp edges or transparency, and WebP when you want the smallest file at good quality (great for websites).
For JPG and WebP it trades file size against fidelity — lower means smaller. PNG is lossless, so the slider does not affect it.
Converting a transparent PNG to JPG fills the background white (JPG has no transparency). Convert to WebP or keep PNG to preserve transparency.
No — the conversion happens entirely in your browser and the image is never sent anywhere.
Once, at the moment of conversion, because JPG is lossy. The drop is usually invisible on photographs at high quality settings and clearly visible on screenshots or text, where PNG is the better format to stay in.
A photographic JPEG can become larger as PNG because the encodings represent its pixels differently. Compare the actual output. Choose JPEG or supported WebP when suitable, and PNG when lossless pixel storage or transparency is required.
Choose the output for its destination
Converting a format changes the encoded file; renaming an extension does not.
Photographs, graphics and transparency
JPEG often suits photographs but has no alpha channel. PNG retains decoded pixels without another lossy encoding step and supports transparency. WebP can be useful when the receiving application accepts it. Compare actual bytes and visible detail instead of assuming a fixed saving.
PDF pages use another workflow
Use PDF to JPG to render a document page to pixels, or Image to PDF to place images on document pages. Neither operation reconstructs editable text from a photograph.
Inspect the saved format
Check the output’s format, dimensions and transparent areas. Metadata, animation and color appearance may change during browser decoding and re-encoding. Keep the source when those features matter.