File Compressor: Compress PDF & Images to 100 KB
PopularNewMake any PDF, photo or scan small enough to upload. Pick a target such as 100 KB or 200 KB and every file is compressed to fit, from several MB down to a few KB. Files already under the limit are left as they are, and nothing is uploaded.
Processed on your device PDF toolsAccepts PDF, JPG, PNG, WebP, HEICUpdated
How to use File Compressor
- 1
Add PDFs and photos, together or one at a time.
- 2
Pick a target size such as 100 KB, or type any size in KB.
- 3
Compress, then download each file or all of them as a ZIP.
Features
- PDF, JPG, PNG, WebP and iPhone HEIC in one place
- Target sizes from 20 KB to 1 MB, or any size in KB
- Files already under the target are kept unchanged
- Batch compression with ZIP download
Compress any file to 100 KB, 200 KB or 1 MB
Schools, offices, job portals and government websites all set upload limits, and the files people need to send, such as scanned certificates, ID cards, mark sheets, application forms and phone photos, are usually far too big. The File Compressor shrinks PDFs and images from several MB down to the exact limit you need: pick 20 KB, 50 KB, 100 KB, 200 KB, 500 KB or 1 MB, or type any size from 5 KB upwards. It accepts PDFs up to 200 MB and images up to 50 MB.
Each file is compressed only as much as it needs. PDFs start at a sharp 150 DPI and the resolution is lowered step by step until the file fits; photos keep their dimensions where possible and are scaled down only when quality alone isn't enough. Files that are already under the limit are returned unchanged, and iPhone HEIC photos are converted to JPG so every form accepts them. 100 KB is the most common limit on online forms, so it is selected by default.
To send a Word or Excel document, save it as PDF first and then compress the PDF. If a long PDF can't reach a very small target, remove pages you don't need with Split PDF, or use Compress PDF for a quick size reduction without a fixed target. Our guide on compressing an image to 100 KB covers photos, signatures and passport pictures step by step.
Common file size limits
Typical limits on forms and portals. Always check the exact size the form asks for, then compress to it.
| What you are uploading | Usual limit | Compress it |
|---|---|---|
| Scanned signature on an application form | 10–20 KB | Compress Image to 20 KB |
| Passport-size photo for exam and job forms | 20–50 KB | Compress Image to 50 KB |
| Photo or ID upload on job portals | 100 KB | Compress Image to 100 KB |
| Certificates and documents as PDF | 100–200 KB | Compress PDF to 200 KB |
| Government and university portals | 500 KB | Compress PDF to 500 KB |
| Upload forms with a 1 MB cap | 1 MB | Compress PDF to 1 MB |
Real results: from MB to KB
Measured with these tools in Chrome on a laptop. Your own files may shrink more or less depending on what is in them.
| File | Before | Target | After | Saved |
|---|---|---|---|---|
| 3-page PDF of photos | 6.2 MB | 100 KB | 39 KB | −99% |
| 10-page PDF of photos | 1.9 MB | 200 KB | 166 KB | −91% |
| 10-page PDF of photos | 1.9 MB | 1 MB | 607 KB | −69% |
| 3000 × 2000 photo (JPG) | 1.9 MB | 100 KB | 91 KB | −95% |
| 3000 × 2000 photo (JPG) | 1.9 MB | 50 KB | 47 KB | −98% |
| 3000 × 2000 photo (JPG) | 1.9 MB | 20 KB | 20 KB | −99% |
Compress a PDF to a specific size
Frequently asked questions
How do I compress a file to 100 KB?
Add the file, keep 100 KB selected and press Compress. Each file is made smaller than 100 KB and the result shows the size before and after.
Which files can I compress?
PDFs and images: JPG, PNG, WebP and iPhone HEIC photos. For a Word or Excel document, save it as PDF first (File › Save as › PDF), then compress the PDF.
What is the most common size limit?
100 KB is the most common limit on job portals and online application forms. Passport-size photos are often limited to 50 KB and signatures to 20 KB; email attachments usually allow a few MB.
How small can a PDF get?
A one- or two-page scan usually fits under 100 KB. Long documents need more space per page to stay readable, so the tool tells you if a file could not reach the target and gives you the smallest readable version.
Will the compressed PDF still be readable?
Yes. The tool starts at high quality and lowers the resolution only as far as needed to fit. Pages are saved as images, so their text can't be selected afterwards.
Are my files uploaded to a server?
No. File Compressor runs entirely in your browser, so your files stay on your device. Nothing is uploaded, stored or seen by anyone else.
Is File Compressor free?
Yes. It is completely free, with no sign-up and no watermarks.