Image Tools
Convert, resize and optimise images — JPG, PNG, WebP and AVIF — with every step running locally in your browser.
1 tool
Choosing an image format is a three-way trade between compatibility, file size and features. JPEG is universally understood and compresses photographs well, but has no transparency and degrades each time it is re-saved. PNG is lossless with full alpha and is ideal for screenshots, diagrams and logos, but produces very large files for photographic content. WebP and AVIF compress far better than either, at the cost of support in older software.
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About Image Tools
Conversion here goes through the browser's own decoding and encoding pipeline, in the tab. That is the reason the tool takes this form: the images people need to convert are frequently photographs of documents, product shots that have not been published yet, or screenshots containing internal information. Uploading them to a server to change a container format is an unnecessary disclosure.
The honest caveat is that lossy formats are lossy and converting between them compounds the loss. Converting a JPEG to WebP and back to JPEG will not return the file you started with, and no setting restores what the first encoder discarded. Convert once, from the best source you have, and keep that source.
Frequently asked questions
Which format should I use for photographs, screenshots and logos?
Photographs suit JPEG, WebP or AVIF, because they contain continuous-tone data with few sharp edges, which is what lossy compression handles well. Screenshots, diagrams, charts and text suit PNG or lossless WebP, because lossy formats put visible artefacts around high-contrast edges and thin text is the worst case for them. Logos and icons usually want PNG or SVG; if a raster logo needs transparency, PNG is the safe answer, since a lossy format with an alpha channel tends to show halos along the edges.
Why did my PNG get larger after conversion?
Because the input was already compressed in a format suited to its content. A photograph stored as a JPEG cannot normally be re-encoded as PNG into a smaller file, since PNG's lossless compression is a poor match for continuous-tone data, so the file grows. PNG to WebP can shrink a screenshot substantially, but PNG to JPEG on a screenshot trades size for visible artefacts around the text. Compare output against input before replacing the original.
Does converting lose quality?
Converting to a lossy format does; converting between lossless formats does not. Decoding a JPEG and encoding it again applies a second, cumulative loss even if both passes used high quality settings, which is why a file should be converted once rather than repeatedly as a design is iterated. Where the choice matters, start from the largest and least-processed version you have and convert at the end.
Why does the file lose its metadata?
Because metadata is not part of the pixels, and re-encoding reconstructs the image rather than copying it, so EXIF camera data, colour profiles and embedded thumbnails are not carried across by default. That is usually desirable, since EXIF often contains GPS coordinates, device serial numbers and timestamps — but it is worth knowing that orientation information lives there too, which is why a photograph can appear rotated after conversion in software that ignores the EXIF orientation flag.
Are my images uploaded?
No. Files are decoded and re-encoded inside the page using the browser's own image codecs, and nothing is transmitted. The tool keeps working with the network disconnected, which is the practical way to verify that rather than trusting the claim. Very large images are limited by your device's memory rather than by a server-side quota, so the ceiling is higher than on an upload-based converter.
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This space is reserved for a sponsor. Every tool on this site stays free and runs locally in your browser.