Compress an Image to a Target File Size
Input your target file budget, then generate the best valid local output that stays under the limit.
Drag and drop your images hereor click to browse local files (JPEG, PNG, WebP, AVIF)MAX 100MBMULTI-FILE OKNO UPLOADS
Upload images to continue into compression settings. Processing runs in your browser.
Compress to a real upload limit
This workflow is built for forms, marketplaces, CMS media libraries, applicant portals, and other places that reject files above a strict KB or MB ceiling. The browser tests encoder quality locally and verifies the actual output bytes before marking a file complete.
What happens locally
ResizeSetGo decodes the image in your browser, applies optional dimensions and fit behavior, encodes to JPEG, PNG, or WebP, then checks the actual file size of what you'll download. Source images, filenames, previews, and EXIF contents are never uploaded. Everything runs in your browser.
Example: a 600 × 600 image under 100 KB
Suppose your destination requires a square JPEG with a file-size ceiling. Start with a landscape image, then use these settings together. This is an example, not a requirement for any specific service; check the destination's own rules first.
- Select your image and open the Dimensions tab.
- Set Width (px) and Height (px) to 600.
- Choose Crop to fill for an edge-to-edge square, or Pad to fit to keep the full image on a background.
- Select .jpg (JPEG) and enter 100 in Max File Size Target.
- Choose Process & Optimize, review the result's dimensions and file size, then use Download All as ZIP and extract your image.
The target is a maximum, not an exact byte count: a smaller file is valid too. Here, 100 KB means 102,400 bytes. If a destination defines its limit as 100,000 bytes, enter 97 KB to stay below that ceiling. Check visual quality as well as the numbers.
Choose cropping or padding deliberately
For a 1200 × 800 landscape source, a centered 600 × 600 crop keeps the middle 800 × 800 area and removes 200 source pixels from each side. Review the preview so faces, text, or product edges are not cut off. Padding instead scales the full image to 600 × 400 and, when centered, adds 100 pixels above and below. Both outputs are 600 × 600; only padding preserves the entire composition.
When the size target cannot be met
Detailed images may not fit a small budget at the required dimensions. A Needs changes result is not a compliant download. Increase the KB limit only if the destination allows it, reduce dimensions only if they are flexible, or try another accepted format. A suggested smaller size must still satisfy the destination's dimension rules; process again after changing settings.
JPEG and WebP use adjustable lossy quality. PNG does not have the same browser quality control, so a PNG can remain over budget. JPEG also removes transparency; use PNG or WebP when transparency is required and the destination accepts it.