Guides
Practical, sourced answers for the size rules on application forms: photos, signatures and PDFs.
We compressed one scanned PDF to 50KB, 100KB, 200KB, 300KB, 500KB, 1MB and 2MB: what each size doesOne 3-page phone-scan PDF (3.61 MB) run through seven size limits with the same tool. The result size, how the pages were rebuilt, and how readable the text stayed at 50KB, 100KB, 200KB, 300KB, 500KB, 1MB and 2MB.
Indian e-Visa photo requirements: a square JPEG of 10KB–1MB, and the passport page as a PDF under 300KBThe Indian e-Visa form takes two uploads: a square JPEG photo of 10KB–1MB (at least 350 × 350 pixels) and your passport bio page as a PDF of 10KB–300KB. The official rules in one place, what the three upload error messages mean, why 1MB means 1,000,000 bytes, and how to make both files from phone photos.
SSC signature and photo upload 2026: the 10–20KB rule, the 80% rule and why forms get rejectedSSC asks for a 10–20KB JPEG signature of about 6.0 × 2.0 cm and a live photograph. What the 2026 notices say, what SSC's own instruction sheet lists as rejection reasons, and how to make a signature that passes.
UGC NET December 2026 photo and signature size: what the bulletin asks forThe UGC-NET December 2026 bulletin asks for a live photograph, a 10–200KB photo with 80% face and ears visible, and a 10–50KB signature — not the old 4–30KB. Dates, rejection reasons and a free tool for each file.
How to reduce PDF size on iPhone and Mac: the built-in options, testedWe ran Preview's Reduce File Size, the Shortcuts PDF action and SlimIO on the same three PDFs. What each one did to the file size, to the text and to the picture quality, and which to use.
How to compress a PDF without losing quality (and hit an exact size like 100KB)Why PDFs get big, what compression actually changes, which settings keep text sharp, and how to get a PDF under a fixed limit like 100KB, 200KB or 1MB without making it unreadable.
Photo and signature size for Indian exams: RRB, SSC, UPSC, NEET, UGC NET and IBPS (2026)The official photo and signature upload rules for RRB NTPC, SSC, UPSC, NEET, UGC NET and IBPS/SBI in one table — KB range, pixels and the mistakes that get forms rejected — with a free tool preset for each.
KB, pixels, cm and DPI: photo size rules on application forms, explainedWhat "3.5 × 4.5 cm", "200 × 230 pixels", "200 DPI" and "20–50KB" each mean on an application form, how to convert between them, and why a photo can be the right size in pixels but the wrong size in KB.
How to make a clean signature image for online forms (JPG 10–20KB or transparent PNG)Turn a signature on paper into a clean JPG that passes exam and job portals (10–20KB, 140 × 60 px and similar) or a transparent PNG for signing documents — how to photograph it, clean it and size it.
US visa photo requirements for the DS-160: 600×600, 240KB and why uploads failThe official DS-160 digital photo rules in one place — pixels, 240KB, the 20:1 compression limit, head size and eye height in pixels — plus the reasons uploads fail and what to do when they do.