Can this page give me a PDF under 300KB?

No. It produces a JPG. Compress the certificate here with the size box set a little lower, around 250, then convert that JPG to PDF with your device’s print-to-PDF option and check that the PDF is still below 300KB.

My form says 50KB to 300KB. How do I stay above 50KB?

Tick “My form also has a minimum size” under the size field and type 50. The tool then lifts quality, and the pixel size if needed, until the file lands inside the band. It matters mainly for sparse pages with lots of white space.

Will the small print on my marksheet still be readable?

Usually, yes, because 300KB lets a single page keep a high pixel count. Blur at this size almost always comes from the photo itself: an angled shot, a shadow across the page or low light. Retake it flat and evenly lit and the compressed copy will look clean.

Can I compress to 300KB without losing quality?

Some data is always thrown away when a multi-megabyte photo becomes 300KB, but for a document the loss is mostly in the paper grain and background, not in the writing. Check the preview at full zoom before saving, and keep your original for anything you may need to print large.

My certificate has two pages. How do I fit both into one 300KB file?

Join the two scans top to bottom with the merge tool, then add the combined picture here. Both pages now share the 300KB budget, so the tool may reduce the pixel size; zoom in on each page in the preview to make sure both are still readable.

Does 300KB mean 300,000 or 307,200 bytes?

This tool counts 1KB as 1,024 bytes, so the file stays at or under 307,200 bytes. If a portal turns out to use the round 300,000, set the size box to 290 to stay safely inside.

Compress Image to 300KB for Certificates and Signatures

Three hundred kilobytes is the cap that application portals tend to give documents rather than faces: a Class 10 marksheet, a category or disability certificate, an address proof, a signature strip. A single page photographed on a modern phone weighs three to eight megabytes, so it needs shrinking, but 300KB is roomy enough that the letters, stamps and seals on that page can survive the trip if the squeeze is done carefully.

This page is fixed at 300KB and begins as soon as a scan arrives. The thing to watch is legibility, not looks. Below you will also find what to do when the form wants a PDF instead of a picture, when it sets a lower limit such as 50KB, and why a signature field with a 300KB cap is really testing the pixel size.

Before and after

A scattered pile of printed photographs of clothing and still-life scenes lying on a woven rattan surface — This photo was 1.50 MB. With the limit set to 300 KB, it came out at 296 KB, which is 81% smaller.
To fit, the tool also scaled the picture down from 2400 × 3600 px to 2036 × 3055 px.
The image on the right is the actual file the tool above produced.

The same photo compressed to 296 KB — This photo was 1.50 MB. With the limit set to 300 KB, it came out at 296 KB, which is 81% smaller.
To fit, the tool also scaled the picture down from 2400 × 3600 px to 2036 × 3055 px.
The image on the right is the actual file the tool above produced.

How to use it

Photograph or scan the certificate flat, in daylight, with the page filling the frame. Crop off the table and your fingers first; every centimetre of background costs bytes that the text could use.
Add that picture here, whether JPG, PNG or an iPhone HEIC. The compressor tries the highest JPG quality that fits under 300KB and only trims the pixel size if quality alone cannot get there.
Zoom into the preview on the smallest line of print, such as a roll number or a date of birth. If you can read it on your phone, an examiner can read it on a monitor.
Save the JPG. If the field takes only PDF, build the PDF from this file next and check its weight before uploading, as explained below.

Certificates, signatures and documents capped at 300KB

National Testing Agency (NTA) notices for NEET (UG) 2026, JEE (Main) 2026, CUET (UG) 2026 and UGC-NET December 2025 ask for supporting certificates as a pdf between 50 kb to 300 kb. The same notices set a different rule for the identity proof, JPG/JPEG 10 kb to 200 kb, so that one belongs on the 200KB page instead.

GATE 2026, run by IIT Guwahati, wants the signature in JPEG/JPG format with a minimum of 3 kB and maximum of 300 kB, a maximum pixel resolution of 580 × 180 pixels and a minimum of 250 × 80 pixels, a height to width ratio of 1 : R with R between 2.75 and 3.75, in black or dark blue ink. A strip that size weighs only a few tens of kilobytes, so the ceiling is easy; the pixel box and the ratio are what reject uploads. Crop the signature to a wide strip and set the pixels with the resize tool, then check the weight here.

For a new PAN application on Form 49A / 49AA through Protean, supporting documents go up as PDF/A or JPEG, scanned in black and white at 200 dpi, with a maximum of 300KB per page.

Turning a 300KB scan into a PDF that still fits

This tool writes JPG only; it cannot create or shrink a PDF. When a portal insists on PDF, compress the scan here first and then wrap it with your phone or computer’s print-to-PDF or save-as-PDF option. That step adds its own overhead and sometimes re-encodes the picture, so a JPG of exactly 300KB can turn into a PDF that is over the line. Change the size box on this page to about 250 before compressing, which leaves room for the wrapper, then confirm the final PDF size in your file manager.

The lower bound matters too. A plain one-line certificate on white paper can compress to well under 50KB, and NTA forms refuse files below that. Tick “My form also has a minimum size”, enter 50, and the tool raises quality, enlarging the scan up to three times if necessary, until it sits between the two limits. If the page is too blank to reach 50KB even so, the tool tells you rather than handing over a file that will bounce; a rescan at higher resolution usually solves it.

Frequently asked questions

Can this page give me a PDF under 300KB?: No. It produces a JPG. Compress the certificate here with the size box set a little lower, around 250, then convert that JPG to PDF with your device’s print-to-PDF option and check that the PDF is still below 300KB.
My form says 50KB to 300KB. How do I stay above 50KB?: Tick “My form also has a minimum size” under the size field and type 50. The tool then lifts quality, and the pixel size if needed, until the file lands inside the band. It matters mainly for sparse pages with lots of white space.
Will the small print on my marksheet still be readable?: Usually, yes, because 300KB lets a single page keep a high pixel count. Blur at this size almost always comes from the photo itself: an angled shot, a shadow across the page or low light. Retake it flat and evenly lit and the compressed copy will look clean.
Can I compress to 300KB without losing quality?: Some data is always thrown away when a multi-megabyte photo becomes 300KB, but for a document the loss is mostly in the paper grain and background, not in the writing. Check the preview at full zoom before saving, and keep your original for anything you may need to print large.
My certificate has two pages. How do I fit both into one 300KB file?: Join the two scans top to bottom with the merge tool, then add the combined picture here. Both pages now share the 300KB budget, so the tool may reduce the pixel size; zoom in on each page in the preview to make sure both are still readable.
Does 300KB mean 300,000 or 307,200 bytes?: This tool counts 1KB as 1,024 bytes, so the file stays at or under 307,200 bytes. If a portal turns out to use the round 300,000, set the size box to 290 to stay safely inside.