Guides
The questions behind the tools, answered properly — what the upload limits really are, which barcode you need, how big a passport photo has to be.
How to compress a PDF to 500 KB for a job application
Job portals often cap a CV at 500 KB. Here is what actually makes a PDF big, and how to get under the limit without the text turning to mush.
Compress PDF · PDF to JPG · JPG to PDF
How to reduce a PDF for a visa application upload
Visa portals have some of the tightest upload limits on the internet. What the common caps are, and how to meet them without making documents unreadable.
Compress PDF · Merge PDF · JPG to PDF · Passport Photo
Passport and visa photo sizes, country by country
The exact millimetres each country wants, how much of the frame your head should fill, and the rules that get photos rejected.
Passport Photo · Background Remover · Compress Image
How to translate a PDF between Bengali and English
What works, what does not, and why a scanned Bengali document needs an extra step before any translator can read it.
Translate PDF · OCR PDF · AI Summarizer
Which barcode format do you need?
EAN-13, UPC-A, Code 128, ITF-14, EAN-8 and Code 39 explained: what each is for, how many digits it takes, and which one your use needs.
Barcode Generator · QR Code Generator
Bigha, katha and decimal to square feet
The standard survey values used in Bangladesh and West Bengal, why bigha means different things in different states, and how to convert between them.
Unit Converter
How to sign a PDF without printing it
Add a signature to a document on screen, and understand the difference between a picture of a signature and a digital signature that proves who signed.
Sign PDF · Fill PDF Forms · Protect PDF
How to scan a document with your phone, without an app
Turn a phone camera into a usable document scanner: lighting, angle, resolution, and how to end up with a searchable PDF rather than a folder of photos.
Scan to PDF · OCR PDF · Compress PDF