The third upload OPSC requires and almost nobody mentions. Frames your impression at exactly 150 × 200 px under 150 KB, and checks it is not too faint or too blotted to read.
or browse your files
| Dimensions | 150 W × 200 H pixels — same frame as the photograph |
|---|---|
| File size | Less than 150 KB — no minimum is stated |
| Format | JPG or JPEG only |
| Which digit | Left thumb — but see below |
| Ink | Not specified by OPSC |
| Mandatory | Yes — the profile cannot be saved without it |
OPSC's wording: “The applicant can click on Save button only after uploading the Photograph, Signature and Thumb impression images”, and “Only JPG and JPEG image file formats are accepted for the applicant photograph, signature and Thumb impression”.
We checked the three tool sites ranking for OPSC photo and signature resizing in August 2026. Not one of them mentions the thumb impression. Someone who prepares a photograph and a signature from those pages arrives at e-Chayan, fills in five sections of profile, and finds the Save button will not respond — because OPSC will not save a profile until all three images are in place.
They are also, all three of them, giving the wrong dimensions for the two uploads they do cover. Details are on the photograph page.
The instruction text in OPSC's guide says left thumb impression. The field label on the portal itself reads “Applicant Left Thumb / Right Thumb / Any finger Impression”. Those are not the same rule, and we are not going to pick one for you: the label is the broader of the two and clearly exists to accommodate candidates who cannot give a left thumb. If your left thumb is available, using it satisfies both readings and removes the question.
The frame is small and the detail is fine, so the impression itself matters more than the scanning. Press once and firmly onto plain paper without rolling or sliding — a smeared print is the common failure and no amount of processing recovers it. Let the ink dry before photographing. Shoot straight down in even light so no shadow falls across the paper, and fill the frame with the impression rather than the whole sheet.
This tool finds the impression, trims to it, and measures two things: the contrast between the ink and the paper, and how much of the impression's own area is actually inked. A print that is too light reads low on the first; one that is blotted reads high on the second. Both are visible before you download rather than after OPSC rejects the image.
OPSC names no ink colour and no pad type. A stamp pad on white paper is the usual approach and photographs well, but the Commission has not made it a rule and neither have we.
A fingerprint is biometric data. It is not revocable the way a password is, and the ordinary way to resize an image online is to upload it to somebody else's server. Everything on this page — reading, trimming, measuring, re-encoding — happens in your browser. The file never leaves your machine.
OPSC's website is opsc.gov.in. Its “Apply Online” button sends you to opscechayan.in — the e-Chayan Online Recruitment Management System — which is a plain .in address rather than a government one. That is legitimate: it is linked from the Commission's own site and its upload guide is the document quoted here. But if you have been taught to check for .gov.in before typing anything personal, the hesitation is reasonable, and it is worth knowing in advance rather than at the moment you are asked for an identity certificate number.
One more thing from the portal itself: if you registered on OPSC's old portal before 5 August 2022, that account does not carry over. You have to register again on e-Chayan to apply for anything published since.
The state was officially renamed from Orissa to Odisha in 2011 and the commission followed, so the body is now the Odisha Public Service Commission. Older guides, and a good deal of search traffic, still say Orissa PSC. Same commission, same specification.
Do not confuse it with OSSC, the Odisha Staff Selection Commission, or OSSSC, the Odisha Sub-Ordinate Staff Selection Commission. Those are separate bodies with their own portals and their own upload rules. Nothing on this page applies to them.
Same application, different file. Each has its own limits — they are not interchangeable.
Yes, and it is mandatory. OPSC's upload guide says the Save button only becomes available after the photograph, signature and thumb impression have all been uploaded. It is the requirement most guides to OPSC leave out entirely - none of the three tool sites we checked mentions it at all.
150 pixels wide by 200 pixels tall, in JPG or JPEG, less than 150 KB. Same frame as the photograph, and the same 150 KB ceiling as all three uploads.
OPSC's own document is inconsistent, so we report both readings. The instruction text says left thumb impression. The field label on the portal reads 'Applicant Left Thumb / Right Thumb / Any finger Impression', which is broader and covers candidates who cannot give a left thumb. If the left thumb is available, using it satisfies both readings.
OPSC does not say. Its guide gives dimensions, file size and format for the thumb impression and nothing else - no ink colour, no paper, no pad type. A stamp pad on plain white paper is the conventional approach and photographs well, but it is not a published rule and we do not present it as one.
Press once, firmly, without rolling or sliding - a smudged impression is the usual failure. Let it dry before you photograph it. Shoot straight down in even light with no shadow across the paper, and fill the frame with the impression rather than the whole page. This tool finds the impression in your image, trims to it and measures how much of the frame is actually ink, which is the quickest way to see whether the print is too light or blotted.
No. 150 KB is a ceiling and OPSC gives no floor for any of the three uploads.
No. Everything runs in your browser on your own device. That matters more here than on most pages - a fingerprint is biometric data, and the ordinary way to resize one is to hand it to a stranger's website.
Requirements on this page are quoted from the “How to upload Photo and Signature” guide published by the Odisha Public Service Commission on its e-Chayan application portal opscechayan.in, linked as “Apply Online” from opsc.gov.in, together with the portal upload screens reproduced inside it. OPSC states exact pixel dimensions, JPG/JPEG format and a 150 KB ceiling on all three uploads; it states no minimum file size and no DPI.
That document carries no version number or date, so check the advertisement you are applying under. Figures of 200×240 for the photograph and 140×60 for the signature circulate widely and appear nowhere in the Commission’s guide — the correct figures are 150×200 and 200×100, and a third upload, the thumb impression, is mandatory. Formerly the Orissa Public Service Commission; not OSSC or OSSSC. We are not affiliated with the Commission.