Drop your file here
or choose a file · PDF, JPG, PNG, WebP, TIFF or BMP
- Deleted automatically
- Free, no watermark
- Quality kept where possible
Getting an SC/ST certificate PDF under 400 KB
RRB's Centralised Employment Notification 09/2025 asks SC/ST candidates who want the free railway travel pass to upload their SC/ST certificate as a PDF of less than 400 KB, legible and clear.
A certificate of one or two pages fits in 400 KB comfortably. We lower the resolution of the scan step by step and keep the first step that fits, so the text stays as readable as the limit allows.
Tips
- Scan the certificate flat and in good light, with the whole page in the frame.
- If your certificate is a photo, save it as a PDF first (most phones can print to PDF), then compress it here.
- The certificate must be the latest valid one as on the closing date of the application.
Requirements from RRB Centralised Employment Notification 09/2025, checked 26 September 2026. Forms change their rules, so check the form itself if something is rejected.
How it works
- 1
Drop your file
A PDF or an image. It goes over an encrypted connection and nowhere else.
- 2
Pick your limit
Choose the size the form asks for. We start with a cleanup that changes nothing you can see.
- 3
Download it
If it needs more, we find the gentlest quality setting that still fits, and delete everything soon after.
Questions
Is it free?
Yes. There is no sign-up and no watermark.
What happens to my file?
It is processed on our server and deleted automatically: the original 5 minutes after the run finishes, the compressed file after 10. A file you upload but never compress is deleted within 30 minutes. You can also delete everything right away with Delete now.
Will it look worse?
We try a lossless cleanup first, which does not change how the file looks. Only if that is not enough do we lower image quality, and we pick the gentlest setting that still fits your size.
What if my file cannot get that small?
You get the smallest version we could make and a clear note saying so, instead of a file that silently misses the limit.
Why does the size page aim a little under its limit?
Some sites count a kilobyte as 1000 bytes and others as 1024. We aim under the stricter one, so a 200 KB page aims for 200,000 bytes and the file passes either way.