Guides
Answers to common questions about image formats, PDF files, sizes and conversions, tested with our own tools.
- Photo and Signature Size for SSC, UPSC, IBPS and NEET FormsThe photo and signature size each 2026 notice asks for, in pixels and KB, for IBPS, UPSC, SSC, NEET and Passport Seva, and how to meet the range first time.Read the guide
- How to Fill Out a PDF Form Online, Even One Without FieldsFill out a PDF form online: type into its fields, decide whether to lock the answers, and what to do when a form has no boxes or will not take the rupee sign.Read the guide
- How to Sign a PDF Online, and What Kind of Signature It IsSign a PDF by drawing or typing your signature and placing it on the line, and learn when a picture of a signature is accepted and when it is not.Read the guide
- How to Redact a PDF So the Hidden Text Is Really GoneRedact a PDF properly: why a black box often hides nothing, how to remove names and numbers for good, and how to check the result before you share it.Read the guide
- Updated How to Combine Photos into One PDF (In the Right Order)Combine JPG, PNG or WebP photos into one PDF in the right order. See how page layout and image quality affect the result, with a real example and size tips.Read the guide
- Updated JPG vs PNG: Which Image Format Should You Use?JPG vs PNG explained with real file sizes: which format suits photos, screenshots and logos, when transparency matters, and when to convert.Read the guide
- Updated What Is a WebP File, and How Do You Open or Convert It?What a WebP file is, why websites use it, how to open one, and how to convert WebP to PNG or JPG when an app or upload form will not accept it.Read the guide
- Updated How to Reduce Image Size for a WebsiteReduce image size for a website in two steps: resize to the width you display, then compress. Real before and after numbers, and what to avoid.Read the guide
- Updated Image Size vs Resolution vs File Size, ExplainedPixel dimensions, resolution (DPI) and file size explained simply, with real examples: what each changes, and which to adjust for screens, print and uploads.Read the guide
- Updated How to Make a Photo Under 100 KB or 200 KB for Online FormsGet a photo under 100 KB or 200 KB for an application or upload form: reduce the pixel size first, then the quality. Real settings and results inside.Read the guide
- Updated Should You Use WebP Images on Your Website?WebP vs JPG for websites: when WebP gives smaller images, when it does not, browser support, and a simple way to decide for your own photos.Read the guide
- Updated How to Merge PDF Files (and Put Pages in the Right Order)How to merge PDF files into one document in the order you want, what carries over and what does not, and how to fix page order before and after merging.Read the guide
- Updated How to Reduce PDF Size (and Why Some PDFs Won't Shrink)Reduce PDF size by shrinking the photos and scans inside it. Real before and after numbers, what each level does, and why text-only PDFs rarely get smaller.Read the guide
- Updated How to Split a PDF into Separate Files or Page RangesSplit a PDF by page range or into single pages, choose between split, extract and delete, and see what you download, with a worked example and tips.Read the guide
- Updated How to Password Protect a PDF (and What Encryption Protects)Add a password to a PDF with AES-256 encryption, pick a password that holds up, and understand what a PDF password does and does not protect against.Read the guide