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HomeToolsCompress PDFCompress PDF to 300KB
Local · no upload›Websites›Documents & scans›PDF›Office & students›

Compress PDF to 300KB

Compress PDF to 300KB for exam and admission portals that take scanned documents between 50 and 300 KB, such as the NTA application forms for NEET and JEE Main. Target size is already 300 KB when this page opens. Add the PDF, press Compress, and you get the clearest version that comes in under the limit. Nothing leaves your device; the work happens in the browser.

WHY USE IT

Features

300 KB filled in

Target size shows 300 the moment the page loads. Does your form name a different cap? Type that number and press Compress again.

Space for a short scanned document

300 KB is roomy for a few scanned pages. In our test, a five-page colour A4 scan of 2.68 MB came out at 259 KB on the Recommended level.

Stops at the first fit

Image resolution starts at 150 DPI and drops only while the file is still over 300 KB, so a one-page scan is not squeezed far below the limit.

Several certificates in one go

Signed in with a free account, add up to 20 PDFs — mark sheet, certificate, address proof — and each one is compressed to 300 KB on its own.

WHAT IT'S FOR

Use cases

NTA exam application documents

NEET and JEE Main application forms take scanned certificates, mark sheets and similar documents as PDFs between 50 and 300 kB.

A certificate scanned at full quality

Office scanners and phone scanning apps often save a single colour page at well over 300 KB, so the portal rejects it.

Two or three pages in one field

A mark sheet with its reverse side, or a short certificate bundle, has a much better chance of fitting at 300 KB than at 100 or 200 KB.

HOW IT WORKS

How to compress a PDF

01

Add your scan

Drag the PDF onto the upload area, or tap Choose PDF to pick it from your files.

02

Check the target

Target size reads 300 and Compression is set to Recommended. Lower the number only if your portal's cap is smaller.

03

Compress and read the size

Press Compress, make sure the new size is under 300 KB and above any minimum your form sets, then download.

Which forms ask you to compress PDF to 300KB?

Indian entrance exams run by the National Testing Agency (NTA) are the best-known case. The NEET (UG) 2026 Information Bulletin lists the category certificate, the Class X certificate and mark sheet, address proof and the PwBD certificate, among others, each as a scanned PDF "between 50 kb to 300 kb". The JEE (Main) 2027 Information Bulletin uses the same range for the Class 10 certificate or mark sheet and the disability certificate.

Photographs and signatures follow different rules on those forms: they are uploaded as JPG files with their own size ranges, not as PDFs. The rules can change between sessions, so check the bulletin for the exam you are applying to.

Don't go below the 50 KB minimum

A range like 50–300 KB has a floor as well as a ceiling, and a file that is too small is refused just like one that is too big. This tool aims only at the ceiling: it keeps the first version under 300 KB, starting from the highest resolution, so it does not shrink a file further than it has to. In our tests, scanned A4 PDFs of one to five pages landed between about 195 and 265 KB at Recommended.

The tool never makes a PDF bigger either. If your scan is already under 50 KB, compressing will not help; scan the page again at a higher resolution or in colour. If it already sits between 50 and 300 KB, you can upload it as it is.

One page or five: what changes inside 300 KB

The limit applies to the whole file, so every extra page leaves less room for each one. With our colour A4 test scans, one page (534 KB) came down to 195 KB, three pages (1.61 MB) to 264 KB and five pages (2.68 MB) to 259 KB — the five-page file had to drop to a lower resolution step to fit.

After compressing a longer document, open “Compare with original” and zoom into the smallest print, a stamp or a signature. That is where a lower step shows first.

FAQ

Frequently asked questions

Open this page, add the PDF and press Compress. The 300 KB target is already set, so the tool lowers the image resolution step by step and returns the first version that is under 300 KB.

The NEET (UG) 2026 Information Bulletin asks for scanned documents such as the category certificate and address proof as PDFs between 50 kB and 300 kB. Photos and signatures are JPG files with separate limits.

Not often at a 300 KB target. The tool keeps the clearest version under 300 KB rather than the smallest possible one, so scanned documents normally stay well above 50 KB. Check the size shown under the result before you upload.

The tool aims for 300,000 bytes, counting 1 KB as 1,000 bytes. A portal that counts 1 KB as 1,024 bytes allows 307,200 bytes, so the result is accepted under either rule.

A single PDF needs no account, and nothing is uploaded: compression runs in your browser. A free account lets you compress up to 20 PDFs at once.

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Media
PDF›
Pricing
Free›
Runs on
Local · no upload›
Task
Compress›
Format
PDF›
Platform
Websites›
Use case
Documents & scans›
For
Office & students›
Feature
Target file size›Batch processing›No upload›