About Kertas
Kertas is a set of free tools for everyday paperwork: shrinking photos to fit upload limits, building PDFs, and preparing passport photos at official sizes.
How it works
Every tool runs inside your browser using Canvas and WebAssembly. Nothing is uploaded, so the tools stay fast on a slow connection and still work on an older phone.
Because no server processes the files, there are no queues, no size limits from us, and no watermarks.
Who it is for
Kertas is built for people in Indonesia, Malaysia, Thailand and the Gulf, who regularly have to upload documents into official forms with strict size limits. The site is available in five languages.
Cost
Every tool is free and needs no account. The site is funded by advertising.