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Image converter, resizer and compressor
Change format, change dimensions, change quality — see the result and the new file size side by side, and download it without the image ever leaving your machine.
Image converter
Say it the way you would say it to a person. Your words are matched to one of 18 tools by readable rules, and the tool runs right here in your browser. No upload, no account.
This tool runs in your browser and needs JavaScript turned on.
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How to use the image converter
- Drop a PNG, JPEG or WebP image into “Your files”.
- Say what you want: “compress this image to webp”, “resize this image to 800px” or “convert it to png”.
- Compare the new dimensions and file size with the original in the answer.
- Download the new image. It was re-encoded in your browser and never uploaded.
Things you can type: compress this image to webp resize this image to 800px
Popular jobs for the image converter
- PNG to WebPTurn a PNG into a WebP, keep the transparency, and see how much smaller it gets.
- JPG to PNGTurn a JPEG into a PNG for editing or for a form that only takes PNG.
- Compress imageLower the quality and the dimensions and see the new file size before you download.
- Resize imageShrink to a maximum width and height, in proportion, keeping the original format.
The reason to do this locally
Image conversion is the most-uploaded task on the web, and the least necessary one. Every browser has had a full image encoder built in for years; sending a photograph to a stranger’s server to have it re-saved as WebP is a habit, not a requirement.
Screenshots of dashboards, scans of documents, photographs of whiteboards — the images people convert are frequently the ones they would least like to hand over.
What you can change
- Format: PNG, JPEG and WebP, in any direction.
- Dimensions, with the aspect ratio held.
- Quality for the lossy formats, with the resulting byte size shown before you commit.
- A preview of the output next to the original size, then a local download.
Drop it anywhere
Drag an image onto the page and it opens here with the file already loaded. The same gesture routes a PDF, a CSV, a JSON file or an HTML file to the tool that fits it.
Which format to convert to
PNG is lossless and comparatively large. Use it for screenshots, diagrams, anything with text or hard edges, and anything needing transparency — a JPEG of a screenshot smears every letter.
JPEG is lossy and old, and it remains the right answer for photographs where the artefacts hide in the detail. Quality 80 is usually indistinguishable from 100 at a third of the size.
WebP does both jobs and produces smaller files than either, which is why it is the sensible default for the web. Its limitation is not the browser any more; it is the occasional desktop application that still refuses to open one.
Resizing is where the bytes are
Quality settings get the attention, but dimensions dominate file size: halving both edges quarters the pixel count. A 4000-pixel photograph displayed in a 800-pixel column is carrying sixteen times the data it needs.
The tool holds the aspect ratio and shows the resulting size before you download, so the tradeoff is visible rather than guessed at.
Questions
Image converter: common questions
Are my images uploaded?
No. Decoding, resizing and re-encoding all use your browser’s own image pipeline. No request is made, and there is no server that could hold a copy.
Does it strip EXIF metadata?
Re-encoding produces a new file from decoded pixels, so camera and location metadata does not survive the conversion. That is usually what you want before sharing an image.
Can it convert HEIC or AVIF?
Only formats your browser can decode. PNG, JPEG and WebP work everywhere; newer formats depend on the browser you are using.