You’re on the document upload screen of an IBPS PO, Clerk, or RRB application, and the form has rejected something — not your certificate’s content, just its size. Five separate fields, five separate limits, and the portal doesn’t tell you which one you missed by how much. This is fixable in a couple of minutes once you know what each field actually wants.
IBPS doesn’t have one size limit — it has five
The photo, the signature, the thumb impression, the handwritten declaration, and your supporting certificates are uploaded as separate files with separate caps. Treating them as one problem is the most common way people get rejected twice.
Per IBPS’s official detailed notifications — Notification CRP CSA-XVI (Clerk, 2026) and Detailed Notification CRP-PO/MT-XVI (2026), both published on ibps.in — the specs are:
| Document | Format | Dimensions | File size |
|---|---|---|---|
| Photograph | JPG/JPEG | 200 × 230 px | 20–50 KB |
| Signature | JPG/JPEG | 140 × 60 px | 10–20 KB |
| Left thumb impression | JPG/JPEG | 240 × 240 px | 20–50 KB |
| Handwritten declaration | JPG/JPEG | 800 × 400 px | 50–100 KB |
| Certificates (educational, category/caste, EWS, experience, PwBD, scribe) | — | under 500 KB each |
The first four are images, not PDFs — IBPS asks for JPG/JPEG specifically, and a photo studio or phone scan will usually hand you something well over 50KB before you touch it. The certificates are the part that matters for a PDF tool: educational mark sheets, caste/category certificates, experience letters, and PwBD or scribe-facility certificates each get uploaded as a separate PDF, each under 500KB. Banking exam prep portals like Bankersadda, which track each IBPS cycle’s notification closely, report the same handwritten-declaration range (50–100KB) for SBI PO — not a coincidence. SBI, RBI, and most other Indian bank recruitment bodies run the same 20–50KB photo / 10–20KB signature / 50–100KB declaration pattern IBPS uses, because several public-sector banks recruit through shared IBPS-run cycles. The one number that shifts most between bodies is the certificate PDF cap — always check the current notification for your specific exam before you submit, since limits get revised between cycles.
Why these get rejected
Two habits cause almost every oversized upload. First, certificates get scanned for print, not for a form field — a flatbed scanner or “best quality” phone scan captures a page at 300 DPI, which is built for reprinting, not for a 500KB ceiling, and can land a one-page certificate at 2-4MB before you’ve done anything else. Second, the declaration and signature get photographed instead of scanned flat — a phone camera shot of a signature on paper, lit unevenly, produces a noisier JPEG than a flatbed scan of the same signature, and noise compresses worse.
One upload field, several documents — merge before you compress
The size limit isn’t the only wall people hit. IBPS forms typically give you one upload slot per certificate category, not one per document — the educational qualification field takes a single PDF, even if you’re holding separate scans for your 10th marksheet, 12th marksheet, and degree certificate. Same story if you’ve got more than one experience letter, or a category certificate plus an EWS certificate that both need to go in one field. Three files don’t fit in one upload box; one merged file does.
Merge PDF handles that step — combine the individual scans into a single PDF, in the order the form expects, before you touch the compressor. Do it in that order, not the reverse: compressing each marksheet separately and then merging the results tends to land you back over the limit, since every separate PDF carries its own file overhead that a single merged file doesn’t. Merge first, then run the combined file through Compress PDF with your target set for the whole document, not per page. Like Merge PDF, it runs entirely in the browser tab — nothing leaves your device to get compressed.
SBI, RRB, and other banks that recruit through shared IBPS-run cycles tend to follow the same one-field-per-category pattern, so it’s worth defaulting to merge-then-compress whenever a portal caps a category rather than a single file.
How to hit the exact number
For the certificate PDFs — the part Compress PDF is built for — the process is the same regardless of which figure you’re matching:
- Open Compress PDF in any browser, desktop or phone. Nothing to install, nothing uploaded to a server — it runs as plain JavaScript inside the tab, which is worth knowing when the file is a category certificate or identity proof.
- Drop in the scanned certificate (merged first, if it’s more than one document — see above).
- Type your exact target — 500KB for most IBPS certificate fields, or whatever figure your specific notification states — into the custom target field. Aim a little under the stated cap rather than exactly at it — 450KB for a 500KB limit, say. It costs nothing, and it’s slack for a file that grows by a few KB after download or a notification whose actual number turns out to be tighter than last cycle’s.
- The tool renders each page, re-encodes it as a JPEG at a given quality, checks the result against your target, and steps quality (then resolution, if needed) down until it clears the number.
- Download the result and check the reported size before uploading.
For the photo, signature, and thumb impression images themselves, the same target-size logic applies if you’re starting from a PDF scan you need to convert down — but those small JPEG caps (10–50KB) are tight enough that a dedicated photo-resize step, not a PDF compressor, usually gets you there more precisely.
If your scanner has a grayscale or black-and-white mode, use it for any certificate that’s just printed text on a white page. A color scan carries three channels of image data a plain-ink document never needed, so a grayscale scan starts smaller and gives the compressor a cleaner, lighter source to work from — you’ll often clear the target at a higher quality setting than a color scan of the same page would allow.
When a document won’t compress that far
Compression here works by rasterizing each page into a JPEG — a scanned certificate is already just a photograph, so shrinking it costs almost nothing visually. A multi-page certificate packed with dense, small-print text is different: there’s a real floor, because cramming fine print into a smaller JPEG eventually blurs it past readable. That’s not the tool failing — it’s an actual tradeoff, and Compress PDF reports honestly on the result screen when a target genuinely can’t be met rather than handing you a file that technically passes and still gets rejected on review.
If that happens, check whether the form accepts the certificate as more than one page via Split PDF, or confirm with the recruiting body whether a slightly larger file is actually tolerated — pushing quality lower past that point just produces a smaller file that’s also unreadable.
Since UPSC, SSC, and IBPS draw from the same pool of government-job applicants, see Compress PDF for UPSC and SSC Forms if you’re juggling multiple applications, or My PDF Was Rejected for Wrong File Size if you’ve already hit this wall once. Start with Compress PDF, type in the number your form asks for, and check the result before you upload it again.