Guides
Practical notes on image compression, PDF tasks, attachment size limits, and more.
How to add a watermark before publishing
How to add a light credit mark, and what watermarks can and cannot do.
2026-08-07 · About 7 min
PDF to images: clarity and file size
How to choose DPI and format when exporting PDF pages as images.
2026-08-07 · About 7 min
Preparing attachments for email and portals
Common size limits, naming habits, and a local way to shrink attachments.
2026-08-07 · About 8 min
Class files and QR code tips
Practical tips for sharing links, collecting scanned homework, and picking names.
2026-08-07 · About 7 min
Build a SQL IN list from an Excel column
Paste a key column into SQL IN Builder, and watch quotes and list length limits.
2026-08-07 · About 7 min
Everyday text helpers for office and writing
A short guide to word count, case change, text diff, and percentage helpers.
2026-08-07 · About 7 min
Tips for submitting homework photos from a phone
Shoot clearly, straighten pages, control file size, then make a PDF to submit.
2026-08-07 · About 8 min
Why password-protected PDFs may not open here
Why encrypted PDFs often fail in the browser, and what you can do instead.
2026-08-07 · About 8 min