SahiScanAndroid · free · no watermark
The exact size the form asked for.
Indian exam and government portals want a photo at 35 x 45 mm, a signature under 20 KB, a PDF under 200 KB. SahiScan makes the file that fits — and checks it before you upload.
Android today · iOS coming soon · free, no watermark
Ready to upload
What you get, free
- Free foreverNo trial, no paywall on any tool.
- No watermarkNothing stamped on your file, ever.
- Works offlineEvery tool runs without a connection.
- No account neededOpen it and use it.
- 16 toolsPassport photos, scanning, resizing, PDFs.
- ID maskingCover the digits before you send a copy.
- Exact KB sizesHit the limit the form actually states.
- SignaturesSign and size in the app.
Every one of these is checkable inside the app in under a minute. Nothing here is a trial.
Rejected uploads are almost never about the document
They are about a number in a notification PDF. A photo two hundred kilobytes too large, a signature saved at the wrong dimensions, a head that fills too little of the frame. The portal says invalid and stops there.
SahiScan works to those numbers directly, then shows you a row-by-row check against the requirement so you can see the file is right before you send it.
What it does
Phone photo → 35 x 45 mm
Passport size photo
A proper 3.5 x 4.5 cm photo from one you already have.
How it works →4.2 MB → 48 KB
Resize to an exact KB
Hit 20 KB, 50 KB, 100 KB - whatever the form demands.
How it works →Photo of paper → Flattened scan
Scan to PDF
Photograph paper and get a flat, readable page.
How it works →Full number → XXXX XXXX 9012
Mask your data
Mask 8 of the 12 digits on a card, or cover anything else, before you send it.
How it works →One photo → 6 on 4R
Print sheet
Fill a 4R or A4 sheet with photos at true size.
How it works →The notification PDF → Files that fit
Exam and government forms
Every file a specific form wants, at its exact sizes.
How it works →Photo of paper → Clean, 18 KB
Signature for a form
Sign on the screen and get a clean signature at the size a form will accept.
How it works →4 photos → 1 PDF
Photos to PDF
Several images into one PDF, in the order you choose.
How it works →3 files, 2 MB → 1 PDF, 480 KB
Merge under a size limit
Combine files into one PDF that lands under the ceiling the form gave you.
How it works →8 pages → Page 2 only
Split a PDF
Take out the pages you need and leave the rest.
How it works →2 photos → 1 page, true size
ID card, both sides
Front and back of a card on one page, at the size it really is.
How it works →PNG → JPG
Convert an image
Change between formats when a portal will only take one of them.
How it works →Screenshot → Text you can paste
Copy text from an image
Lift the text out of a photo or a scan so you can paste it.
How it works →A link → A code that scans
Make a QR code
Turn a link or a piece of text into a QR code you can print.
How it works →Unnumbered → Numbered
Page numbers and stamp
Number the pages of a PDF, or put a short mark across it.
How it works →3 files → 1 upload
Zip files for one upload
Several files as a single upload, when the form gives you one box.
How it works →Every tool, and when you would reach for it
Sixteen of them, all free, none of them watermarked. The examples are the ordinary afternoons people actually open this app for.
Mask your data
Cover an ID number, a photo or a QR code before you send a document on. Open it and the app marks what it found, so you tick what to hide rather than hunting for it yourself. Works on images and PDFs.
For exampleA landlord asks for your ID. You send it with the number covered.
Passport photo
A photo at the size a form asks for, with the head placed where the rule wants it. Choose a border or no border, and come back later to make the same photo at a different size without starting again.
For exampleOne photo, then the same face at 35 x 45 mm and again at 2 x 2 inches.
Signature
Sign on the screen, get a clean signature on white at the dimensions and weight a form will accept.
For exampleA form wants a signature between 10 and 20 KB. You sign once and send it.
Scan document
Point the camera at a page. Edges are found for you, the page is straightened, and you get a PDF rather than a photo of paper.
For exampleYour marksheet, photographed on a desk, comes out square and readable.
Resize to an exact KB
Set the ceiling the portal gave you and get a file under it that still looks like your document.
For exampleA 4 MB photo down to under 100 KB, still legible.
Check before you upload
Hold a file against a requirement and see it row by row - size, dimensions, format - before the portal decides.
For exampleYou see the width is wrong here, instead of after the form resets.
Photos to PDF
Several images into one PDF, in the order you put them.
For exampleFront and back of a card as a single two-page file.
Merge under a size limit
Combine several files into one PDF that lands under a ceiling, rather than merging first and finding out afterwards.
For exampleThree certificates into one PDF under 500 KB.
Split PDF
Take the pages you need out of a longer document.
For examplePage 2 of an eight-page statement, on its own.
Compress
Make a PDF or an image smaller without changing what it is.
For exampleA scan that will not upload, made small enough to.
Convert image
Change a file between formats when a portal insists on one.
For exampleA form takes JPG only and your phone saved a PNG.
ID card
Both sides of a card on one page, at the size they really are.
For exampleFront and back of a licence, printed to scale.
Print sheet
Fill a standard photo print with copies, so a shop prints a sheet instead of one.
For exampleEight passport photos on a 4 x 6 for the price of one print.
Page numbers and stamp
Number the pages of a PDF, or put a short mark across it.
For exampleA bundle that has to arrive numbered.
Copy text
Lift the text out of a photo or a scan so you can paste it.
For exampleA registration number on a screenshot, typed into a form without typos.
Zip files
Several files as one upload, when a form only offers a single box.
For examplePhoto, signature and certificate in one go.
How it works
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1
Pick what you need
Choose a tool, or choose your exam and let the app decide the sizes.
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2
Take or choose a photo
Use the camera, or pick something already on your phone.
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3
Get a file that fits
Exact size, checked against the requirement, ready to upload or print.
We never see your files
Scans, photos and signatures are kept in the app's private storage. They are not uploaded, we hold no copy, and we have no way to retrieve or view them. Signing in saves only the profile details you choose to enter.
Questions
Is SahiScan free?
Yes. Every tool is free and there is no watermark. The app is supported by ads.
Do my documents get uploaded?
No. There is nothing to upload. We never see your scans, photos or signatures, we hold no copy, and we have no way to retrieve them.
Does it work without internet?
Yes, once installed. The first scan needs a connection once to finish setting itself up; after that the tools work offline.
What size should a passport photo be for Indian exam forms?
Most Indian portals ask for 3.5 x 4.5 cm - 35 x 45 mm - with the head taking up most of the frame and a plain light background. The file size limit differs by exam, so check the official notification for your form. SahiScan holds the current figure for each exam it supports and produces the file to match.
How do I reduce a photo to 20 KB without ruining it?
Reduce the pixel dimensions first, then the JPEG quality. Doing it the other way round is what produces blocky results. SahiScan works out the pixel budget from the target size before it touches quality.
Is there an iPhone version?
Not yet. SahiScan is on Android first. An iOS version is planned.
Do I need an account?
You sign in with Google or Facebook so your profile details can follow you to a new phone. If sign-in is not working you can carry on without an account and every tool still works.
Get SahiScan
Free, no watermark, works offline.
Android today · iOS coming soon · free, no watermark