Guides
Practical how-tos
Straightforward walkthroughs for common file tasks. No fluff, and every step works without an account.
PDF Tools · 4 min
How to shrink a PDF so it fits an email attachment
Most mail providers cap attachments at 20–25 MB. Here is how to get a heavy PDF under the limit without a desktop app.
PDF Tools · 3 min
How to combine photos into a single PDF
Turn a folder of receipts, ID scans or whiteboard photos into one tidy PDF, one image per page.
PDF Tools · 3 min
How to turn a PDF into images you can edit or post
Export each PDF page as a JPG or PNG for slide decks, image editors, or anywhere a PDF will not paste.
PDF Tools · 4 min
How to work with sensitive PDFs without uploading them
Contracts, medical records and bank statements should not be sent to a random web server. Here is how to edit them locally.
Image Tools · 4 min
How to compress an image without an obvious drop in quality
Big photos slow pages down and fill up mailboxes. Here is how to make them smaller while keeping them sharp.
Image Tools · 3 min
How to crop an image to an exact aspect ratio
Profile pictures, thumbnails and banners all expect a specific shape. Here is how to crop to 1:1, 16:9 or any ratio cleanly.
Developer Tools · 3 min
Why your 1 GB file shows as 0.93 GB — KB vs KiB explained
Storage is sold in gigabytes; your operating system often counts in gibibytes. The gap is real and predictable.
Developer Tools · 4 min
How to read a JWT (and what you should never do with one)
A JSON Web Token looks like random characters but most of it is plain, readable data. Here is how to inspect one safely.