Image compressor to a target KB – free in your browser, no upload
Chat shortcut: /compress
Image compressor for online applications, government portals, listings or email: enter a target size in KB, choose an image, done. JPG, PNG, WebP and GIF stay on your device; only HEIC, AVIF and TIFF go briefly to ChatX for conversion.
No AI No Sign-Up
Images are processed in your browser, nothing is uploaded. Only HEIC/HEIF (and AVIF/TIFF if your browser can’t read them) are briefly sent to ChatX for conversion.
Smaller file, same image
Compressing reduces the file size of an image. With JPG and WebP this happens first via the quality level: fine details the eye barely notices are stored more sparingly. The lower the quality, the smaller the file and the sooner differences become visible; with photos, a moderate reduction is usually less noticeable than with graphics containing text.
What sets this tool apart is the target size. You specify the maximum file size in kilobytes, and the tool lowers the quality step by step until the file is below that. If that isn't enough, it also reduces the dimensions; with PNG, which has no quality levels, the reduction always happens via the dimensions. You see the size achieved in the result.
Your browser processes JPG, PNG, WebP and GIF; the image is not uploaded, which matters especially for ID photos, passport photos and signatures. Only HEIC, AVIF and TIFF go briefly to ChatX for conversion if your browser can't read them. You need the tool when a portal sets a limit, an email attachment is too large or a website should load faster.
How it works
- 1
Choose image
Drag a JPG, PNG, WebP or GIF into the field, paste it from the clipboard or choose a file.
- 2
Enter target size
Enter the maximum file size in KB, for example 100 for an online application or 200 for a classified listing.
- 3
Set quality and format
Leave the quality at 85 or adjust it; keep the format (GIF becomes PNG) or choose JPG, WebP or PNG as output.
- 4
Compress and save
Start the run, compare the new file size in the result with your target and download the image.
Typical uses
Online applications
Get your photo and scanned documents for visa, school or job applications down to the required 100 or 200 KB; you see the size achieved in the result.
Government forms
Get a signature or passport photo under the limit, right in your browser.
Listings and real estate
Prepare phone photos for listing sites with a size limit.
Email and website
Reduce large photos to a few hundred kilobytes so attachments go through and pages load faster.
Good to know
- Input as JPG, PNG, WebP or GIF up to 100 megapixels; output optionally in the original format, as JPG, WebP or PNG. GIF is output as PNG, animations are lost.
- Your browser processes JPG, PNG, WebP and GIF; nothing is uploaded. The only exception: HEIC, AVIF and TIFF are sent briefly to ChatX for conversion if your browser can't read them.
- Target size first via quality (in steps of 7 points down to at least 35), then via dimensions; with PNG always via dimensions. If the result is still above the target, a smaller target size, a lower starting quality or WebP as output helps.
- WebP often delivers the smaller file at the same quality level, JPG is read by most programs, PNG stores the pixels losslessly and keeps transparency but reaches the target size via smaller dimensions. Output as JPG loses transparency.
- For graphics with text and sharp edges, PNG or WebP is better than heavily compressed JPG; compressing several times costs sharpness each time, so start from the original whenever possible.
- Free, no sign-up, no watermark, one image per run. For fewer pixels instead of fewer kilobytes use “Image resizer”, for a pure format change “Image converter”.
Frequently asked questions
Is my image uploaded?
Not for JPG, PNG, WebP and GIF: your browser does the compression, nothing is sent to ChatX. Only HEIC, AVIF and TIFF are transferred briefly for conversion if your browser can't read them.
How does the tool reach the target size?
It lowers the quality in steps of 7 points down to at least 35 and then reduces the dimensions if needed; with PNG the dimensions are always reduced. If the file still stays above the target, choose a smaller target size, a lower starting quality or WebP as output.
Are the pixel dimensions preserved?
The dimensions are reduced if the target can't be reached via quality alone, with PNG always. You see the new dimensions in the result. If you specifically want fewer pixels, use “Image resizer”.
Does the image visibly lose quality?
That depends on subject, target size and quality level; compare the result with the original. For graphics with text, PNG or WebP is better; for print you shouldn't compress too heavily.
Which format is the smallest?
WebP is often smaller than JPG at the same quality level. JPG is read by most programs, PNG stores the pixels losslessly and keeps transparency.
Which formats work?
JPG, PNG, WebP and GIF as input; output optionally JPG, WebP or PNG, with “original format” GIF becomes PNG. For iPhone HEIC there is “Convert HEIC to JPG”.
Can I compress several images at once?
No, the tool processes one image per run. You start the next run right afterwards.