asantool
Our PDF tools ran on the main thread for months
A one-line import meant to find the pdf.js worker was quietly disabling it. No error, no failed request — every PDF page on the site paid for it.
· 5 min read
Blog
How these jobs actually get done.
Guides to signing, editing and converting PDFs, written by the person who builds the tools — with the measurements, the limits and no sign-up.
Written by Bilal Arif — Builder of asantool.
What is a PDF, and why won't it edit like a Word file?
A PDF is a description of a printed page, not a document. That one difference explains almost every frustrating thing about working with them.
· 7 min read