Most form portals reject a PDF the moment it crosses their size limit, and a phone scan of even two pages can easily be 3–5 MB. This PDF size reducer gets your file under the limit without a laptop or an app. Choose an exact target in KB or a quality level, and the tool keeps the text crisp while it shrinks the images and scans that make the file heavy.
When do you need to reduce PDF size?
Almost every online application in India has a PDF limit, and it is usually small. Limits differ by portal — NTA's JEE Main 2027 bulletin, for example, asks for supporting PDFs of 50–300 KB — so check the exact limit printed on your form.
Common situations where a smaller PDF saves the day:
- Uploading marksheets, caste or income certificates to a scholarship or university admission portal.
- Attaching a resume or experience letter to a job application that rejects files over 1 MB.
- Sending bank KYC documents or a signed form by email when the attachment keeps failing.
- Sharing a scanned PDF on WhatsApp or uploading it over a slow Jio or Airtel 4G connection.
Why won't my PDF go below 100 KB?
Compression only removes weight from images and scans. Typed text and vector graphics are already compact, so a 40-page text-only PDF may not shrink much, while scans shrink a lot: in our tests a 6-page, 5.16 MB scan came down to 877 KB at the 1 MB target, an 83% cut.
In Target size mode the tool lowers image resolution step by step, from 150 DPI down to 40 DPI, until the file fits. Going from 300 to 100 DPI alone cuts the pixel count by about 89%. If even 40 DPI is not enough, you get the smallest size that was possible instead of an unreadable file. If your PDF is already under the target, you get the original back untouched.
- Turn on Black & white for scans; grayscale pages are much lighter than colour.
- Split the PDF and upload only the pages the portal actually asks for.
- Rescan at a lower resolution if the original scan was made at 600 DPI.
Tips so the portal accepts your file
- Zoom into the result before uploading; if stamps or small print look smudged, pick a larger target or Balanced quality.
- Some portals count 1 KB as 1024 bytes and others as 1000 bytes, so aim a little under the limit (for example 190 KB for a 200 KB cap).
- Remove the password from a protected PDF first; locked files cannot be compressed.
- Keep the file name simple, without spaces or symbols, as some older portals reject them.
How does compression work without uploading your file?
The tool runs Ghostscript, a long-established PDF engine, compiled to WebAssembly so it works inside your browser. Your PDF is read and rewritten on your own phone or computer, and the result is saved straight to your device.
Nothing is sent to a server. We only record anonymous counts such as which tool was used and the file size, never the file itself or its name.