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Exact-size PDF compressor
Reduce Image Size Online — Free & Instant
Reduce image size to an exact KB cap. JPG, PNG, and WebP. No signup. Auto-delete in one hour.
Preview
Compressing…
- No file-count paywall
- Auto-delete in 1 hour
- No watermark
- Works on any device
How it works
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1
Upload
Choose a JPG, PNG, or WebP. We check the image header, not just the extension.
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2
Reduce
We step JPEG quality and dimensions down until the file is at or under the target.
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3
Download
Get the smaller image with a time-limited link. Auto-delete in one hour.
Reduce image size without guessing a quality slider
Reduce image size is what you need for exam photographs, signatures, and “upload a screenshot” fields that reject anything over 20–200 KB. Shrinking a PNG in a photo app often still leaves you over the cap because dimensions never changed.
This tool steps JPEG quality and, if needed, pixel dimensions until the file is at or under the target (default 100 KB). PNG sources may be saved as JPEG when that is the only way to hit a tiny cap — we say so on the result panel.
Passport-style photos belong here. Full A4 scans belong in reduce PDF size. For JPEG-only searches see reduce JPG size.
What you get
Exact size targeting
Set 50 KB, 100 KB, 200 KB, 500 KB, or custom — not a vague quality slider.
Text stays readable
PDF reduction downsamples images first so form text and Hindi/English copy stay usable.
Auto-delete in 1 hour
Files sit outside the web root and are purged on a schedule. No training, no ads.
Works on any device
Reduce a PDF or JPG from a phone while filling an exam or job form.
No watermark
The download is your file. We do not stamp pages or photos.
Related tools
Merge PDFs, convert PDF to JPG or Word, then reduce the result to a portal cap.
CompressPdfs Online vs other PDF tools
| Feature | CompressPdfs Online | iLovePDF | Smallpdf | Adobe Acrobat |
|---|---|---|---|---|
| Exact KB/MB target | Yes — 50 KB to custom | Quality presets, not exact KB | Quality / compression level | Reduce Size / PDF Optimizer (paid) |
| Free to use | Yes, fair-use rate limit | Free tier with tool limits | Free tier with daily task caps | Web tools limited; Acrobat is paid |
| Watermark on free file | None | Not on core compress; some tools/plans differ | Free plan restrictions apply | N/A on paid desktop |
| Typical speed | Seconds on a standard form PDF | Fast on free servers | Fast on free servers | Local desktop is fast; cloud depends on plan |
| File retention | Deleted after 1 hour | Temporary processing (vendor policy) | Temporary processing (vendor policy) | Cloud storage if you use Document Cloud |
| Signup required | No | Not for basic compress | Not for basic compress | Adobe ID for cloud features |
Competitor rows describe publicly advertised product behaviour at a high level. Plans change — verify on each vendor’s site before you rely on a limit.
Frequently asked questions
How do I reduce image size online for an exam form?
Upload a JPG, PNG, or WebP, pick the KB cap printed on the form (often 20–50 KB for photos), and download the reduced image. Then confirm pixel size if the notice also lists dimensions.
Will reducing image size make a face unusable?
Very small caps (under 20 KB) can soften faces. Start at the largest size the field allows. If the photo must match the exam-day camera, do not crush it further than the notice requires.
Is it safe to upload my file here?
Uploads are stored outside the public web root, addressed by unguessable names, and deleted automatically after one hour. We do not use your documents for advertising, training, or sharing, and download links expire so a leaked URL stops working.
Is this the same as reduce PDF size?
No. Image size reduction works on photographs. PDF size reduction works on documents. Exam forms almost always keep those as separate fields with different limits.
Which formats can I upload?
JPEG, PNG, and WebP are accepted for image compress. HEIC/HEIF: use the free <a href="/heic-to-jpg">HEIC to JPG</a> converter (browser-side, no server upload), then compress the JPG if needed.
Do you add a watermark?
No. The reduced image has no watermark and no account requirement.