Free · In your browser · No upload
Convert an image
Read PNG, JPEG, WebP, GIF, or AVIF and export to PNG, JPEG, or WebP with an adjustable quality slider.
Many images to do? Try convert images in bulk.
Need more than one operation? Open the full editor to combine tools and reorder your edits.
Picking a format matters more than most people expect, and the right answer depends entirely on what is in the picture. We encoded the same seven images to every format and measured the results: WebP came out between 12% and 70% smaller than JPEG at the same quality setting, with the spread driven almost entirely by content rather than by anything about the encoder.
The most useful thing that measurement turned up concerns screenshots. Our test screenshot was several times larger as a JPEG than as a lossless PNG — and blurrier, because JPEG smears the edges of small text. If your image contains type, a chart, or a diagram, converting it to JPEG makes it both bigger and worse.
How it works
- 1
Load the image you want to convert. PNG, JPEG, WebP, GIF, and AVIF can all be read, so this doubles as a way to open a format an older program cannot.
- 2
Pick the output format. PNG is lossless and keeps transparency; WebP is the smallest option for the web and also supports transparency; JPEG is the most universally compatible but has no transparency at all.
- 3
For JPEG or WebP, set the quality — the projected file size updates as you drag so you can aim at a budget rather than guess.
- 4
Click Download to save the converted file.
Frequently asked questions
Which format should I choose?
For photographs on the web, WebP: it beat JPEG on every photograph we measured, and every current browser supports it. For screenshots, diagrams, or anything containing text, PNG or WebP — never JPEG. Keep JPEG for files leaving the web, such as email attachments or print shops, where maximum compatibility matters.
What happens to transparency when I convert to JPEG?
JPEG has no alpha channel, so transparency cannot survive the conversion. Transparent areas are flattened onto a white background, which is why a logo converted to JPEG arrives with a white box around it. Convert to PNG or WebP if you need the transparency preserved.
Can I convert HEIC photos from my iPhone?
Only if your browser can decode HEIC, and most desktop browsers cannot — this tool relies on the browser’s own image decoders. Safari on Apple devices generally handles it. If your file will not load, exporting it as JPEG from the Photos app first is the reliable route.
Does converting to PNG improve a JPEG’s quality?
No, and this is a common misunderstanding. Converting a JPEG to PNG preserves the compression artefacts already baked into it while making the file much larger. Quality lost to JPEG compression cannot be recovered by any later format change.
Are my files uploaded for conversion?
No. Decoding and re-encoding both use your browser’s built-in image support, so the file never leaves your machine. One practical consequence is that these are Chromium’s or Firefox’s encoders, so results may differ very slightly between browsers.