PDF & Documents
PDFs are the format documents live in once they need to look identical everywhere. Changing them — combining a few files, trimming pages, shrinking one to fit an email limit — is where people get stuck and end up handing sensitive documents to random websites.
These guides show how to reorganize and convert PDFs safely, using tools that do all the work in your browser so nothing is uploaded to a server.
Guides in this topic
How to Merge, Split, and Organize PDF Files
A practical guide to combining, splitting, reordering, rotating, and extracting pages from PDF files — safely in your browser, with no uploads.
How to Reduce PDF File Size (Without Wrecking Quality)
Why PDFs get so large, what actually drives their size, how compression re-encodes images, and practical ways to shrink a PDF to fit an email or upload limit.
How to Convert PDFs to Images or Text
When to turn PDF pages into images versus extracting their text, why some PDFs have no selectable text, and how to convert either way in your browser.
Other guide topics
Data Formats & Encoding
Guides to the formats and encodings that move data around the web — JSON, XML, YAML, CSV, Base64, URL encoding, and character sets.
Text & Writing
Guides for working with text — case conventions, word counts and readability, URL slugs, cleaning up messy text, and character encoding.
Images & Media
Guides to working with images for the web — compression, choosing formats, resizing and cropping, and the metadata hidden inside photos.
Web & Developer
Guides to the building blocks of web development — JWTs, timestamps, HTTP status codes, regular expressions, and color formats.
Security & Privacy
Practical guides to protecting your accounts and data — strong passwords, two-factor authentication, and keeping private information out of the files you share.
Device & Hardware Testing
Guides to checking your hardware — screens, keyboards, mice, cameras, microphones, and sensors — with browser tests that need no installation.