Image Converter changes your pictures from one format to another entirely inside your browser. Input JPG, PNG, WebP, or GIF files and export them as JPG, PNG, or WebP, all without uploading a thing. Convert several images at once in batch and fine-tune output quality to balance file size and clarity. It is free, needs no account, and keeps every image private on your own device.
How to convert images
- 1 Add one or more images to convert.
- 2 Pick your output format: JPG, PNG, or WebP.
- 3 Adjust the quality if you want a smaller file.
- 4 Convert and download your images.
How conversion works
Format conversion here is a resize that keeps the same dimensions. The image is decoded to a bitmap, drawn onto a canvas at its native width and height, and re-encoded into the target format. That sounds roundabout, but it is exactly how browsers convert images: the canvas is the common ground every format decodes into and encodes out of, which is why one code path handles JPEG, PNG and WebP without needing a separate library per format.
Because the pixels pass through a canvas, conversion is a re-encode rather than a repackaging. Converting a JPEG to another JPEG at high quality will be visually identical but not bit-identical, since the image is decompressed and compressed again. Converting to PNG is lossless from that point onward — though it cannot restore detail an earlier JPEG compression already discarded.
When JPEG is the target, the canvas is filled with white before the image is drawn. JPEG has no alpha channel, and without that fill every transparent pixel would come out black rather than white.
Which format to convert to
WebP for the web
WebP produces files roughly 25–35% smaller than JPEG at equivalent quality and supports transparency. Every current browser reads it, which makes it the sensible default for site images.
JPEG for compatibility
When a file must be accepted by an old system, a printer or a government upload form, JPEG is the format nothing refuses. It is the right choice for photographs whenever compatibility outranks size.
PNG for graphics and transparency
Logos, screenshots, diagrams and anything with flat colour or sharp edges belong in PNG. It is lossless, so text in a screenshot stays crisp instead of developing the smeared halo JPEG gives it.
Escaping an awkward format
HEIC from an iPhone and WebP saved from a website are frequently rejected by other software. Converting to JPEG or PNG makes the file usable everywhere.
Why convert image formats
Different formats suit different needs: WebP for lean web graphics, PNG for transparency, and JPG for photos. Batch conversion saves time when you have many files, and quality control lets you decide the tradeoff between size and detail. All conversions happen on your device, so your images stay private and the tool costs nothing.
What conversion cannot fix
Converting changes the container, not the history of the pixels:
- Lost quality does not come back. A JPEG that was saved at low quality carries visible artefacts; converting it to PNG preserves those artefacts perfectly rather than removing them.
- Converting a photograph to PNG will make the file much larger, often several times over. PNG is designed for flat colour, not for photographic noise.
- Transparency is lost when converting to JPEG, replaced by white. Convert to PNG or WebP when the transparent background matters.
- Animation is not preserved. An animated GIF or WebP converts to a single still frame.
- HEIC input depends on your browser. Safari on Apple devices decodes it; most other browsers cannot, so the file will not load.
Troubleshooting
- My PNG got much bigger after converting from JPEG
- Expected, and a sign you chose the wrong target. PNG compresses runs of identical colour, and a photograph has almost none — every pixel differs slightly from its neighbours. For photographs, stay with JPEG or WebP; reserve PNG for graphics with flat areas.
- The converted image looks worse than the original
- Check the quality setting. Anything below about 70% starts to show visible blocking, especially in skies and skin tones. For a conversion you intend to keep, 85% is a good balance; below 60% is only for thumbnails.
- My animated GIF became a still image
- The canvas holds one frame at a time, so animation cannot survive the conversion. Converting an animation to video (MP4 or WebM) needs a dedicated encoder rather than a format converter.
Frequently asked questions
Can I convert several images at once?
Yes. Batch conversion lets you process multiple images in a single run.
Which formats are supported?
You can input JPG, PNG, WebP, and GIF, and export as JPG, PNG, or WebP.
Is WebP safe to use now?
Yes. Every browser released in the last several years supports it, including Safari since version 14 and all current versions of Chrome, Firefox and Edge. The remaining friction is not browsers but older desktop software and some corporate systems, which is exactly when converting to JPEG is worthwhile.
What quality setting should I use?
For photographs destined for the web, 80–85% is the usual sweet spot: the difference from 100% is invisible at normal viewing distance while the file is a fraction of the size. Push to 90% or above only when the image will be examined closely or printed.
Does converting a file repeatedly degrade it?
With lossy formats, yes — this is generation loss. Each JPEG-to-JPEG round trip re-quantises the image and adds a little more damage, and it accumulates. Always convert from your original file rather than from an already-converted copy.
Are my images sent anywhere?
No. The decode, the canvas draw and the encode all run in your browser, with the heavy work moved to a Web Worker where supported. Nothing is transmitted, which is worth knowing given how often "free image converter" services are funded by what they learn from what you upload.