Drop your photo and get a JPEG inside the 10–200 KB window from the Joint CSIR-UGC NET information bulletin — padded up to the 10 KB floor if your file is too light, never pushed below it. The signature and the 50–300 KB certificate PDFs fit here too. Nothing is uploaded; everything runs in your browser.
The Joint CSIR-UGC NET is NTA’s National Eligibility Test for the science streams — Chemical, Earth, Life, Mathematical and Physical Sciences — the gate to JRF, Assistant Professor eligibility and PhD admission, held twice a year. Its Information Bulletin (June-2026 cycle) asks for scanned images in JPG/JPEG format only: a photograph between 10 KB and 200 KB — passport size, white background, 80% face (without mask) visible including ears — and your full signature between 10 KB and 50 KB. Both windows have floors: a file that compresses below the minimum is as invalid as one over the cap. This page is preset for the photo — drop it, and the result lands inside the window, padded up to the 10 KB floor with spec-valid JPEG data if your photo is too light, never pushed below it.
Through the June-2025 cycle the bulletin’s signature window was 4–30 KB. The June-2026 bulletin says 10–50 KB — and unlike its UGC-NET sibling (whose current bulletin genuinely states two different signature windows in the same PDF), it says so consistently in every place the numbers appear. That quiet change broke a year of advice: a large admissions guide still instructs “4-30 KB for the signature,” and an exam-tools site sells “signature 4-30KB” for 2026 in its own page title. Follow either and a 5 KB signature file — perfectly legal last cycle — now lands under the current floor. For the signature pass here, type 11-48kb into Target (inside every reading of the current window), sign in running handwriting with a blue or black pen on white paper, and remember the bulletin’s hard rule: writing your name in capital letters is not accepted and the form is rejected. The signature cleanup tool whitens grey paper and trims to the ink first, if your scan needs it.
Searches still land on csirnet.nta.ac.in, an NTA domain whose notices end at the June-2025 cycle — and whose linked bulletin carries the old 4–30 KB signature window. The live portal for the current cycle is csirnet.nta.nic.in: the June-2026 bulletin, every current notice, and the application form itself all live there. If a guide (or a resizer’s “official specs” box) cites the .ac.in site, it is citing last year. One resizer’s CSIR page wants a photo “between 50 KB and 1 MB” — five times the real cap — and another compresses everything “to exactly 50KB or under,” an arbitrary point in a 10–200 KB window that costs you quality for nothing.
The bulletin gives no pixel or centimetre dimensions for either upload; the photograph is described only as passport size. Any scan in the Indian passport-photo shape — 3.5×4.5 cm portrait; type 350x450 into Exact size if you want a concrete number — inside the KB window will do. File type and kilobytes are what the upload widget enforces; a guide quoting mandatory pixels for CSIR NET is quoting something the bulletin doesn’t say.
No cap, no goggles — spectacles are allowed if used regularly. Polaroid and computer-generated photos are not acceptable, and the bulletin warns that a photograph that looks de-shaped, hand-made or computer-made is rejected and treated as unfair means — so no beautify filters and no AI headshots; use a plain, recent photo. The photo need not be attested. Keep 6–8 passport-size prints of the same photograph: the bulletin has you paste one on the Attendance Sheet at the exam centre, where it is matched against your upload. And submit once — if a candidate files multiple forms for the same course, only the first is considered and the rest are rejected automatically.
Three attachments are PDF only, between 50 KB and 300 KB where applicable: the Result Awaited Attestation Form (Annexure IX — this one also changed, down from last cycle’s 500 KB cap), the Category Certificate (SC/ST/OBC-NCL/EWS), and the PwD/PwBD certificate or UDID. PixFit builds these too: drop the page images, choose PDF as the output format (tick Combine into one PDF for multi-page documents), set Target to 50-300kb, and the finished PDF lands inside the window — floor met honestly with padding if your scans compress small. Already have an oversized PDF from a scan app? The PDF compressor re-fits it under the cap locally.
From the June-2026 bulletin’s own table: registration ran 27 May to 19 June 2026, correction window 22–23 June, and the CBT was held 17–18 July 2026 (180 minutes, two shifts). CSIR NET runs twice a year — the December-2026 cycle publishes a fresh bulletin at csirnet.nta.nic.in, and that PDF plus the form’s own error messages win over any guide, this page included. A photo tied to your research-fellowship identity doesn’t need to pass through a resizer’s server: PixFit runs entirely in your browser — nothing is uploaded, and the re-encode strips EXIF metadata (including GPS) as a side effect. Sitting the other NET too? The UGC NET page covers its (self-contradicting) signature window; GATE, CTET and the full verified table cover the rest.
Spec source: the Information Bulletin for Joint CSIR-UGC NET June 2026, fetched from NTA’s own CDN as linked from csirnet.nta.nic.in, read August 2026; the June-2025 window cited for contrast comes from the previous cycle’s bulletin as still served via csirnet.nta.ac.in. If the current form’s upload screen states different numbers, believe the screen over this page.