The best PDF tool for teachers (2026)
Full disclosure: I make PDF Hammer, one of the tools below. Here’s what I’d actually use if I were teachers, including the ones that aren’t mine.
Start for freeTeachers mostly merge, reorder, and compress: combining worksheets into a packet, fixing a scanned handout that came in sideways, or shrinking a file so the school portal accepts it. All of that is free almost everywhere, so the honest tiebreaker is whether you want an account at all.
The picks
- Best if you don’t want to create an account: PDF24 or iLovePDF
- Best for keeping drafts of tests private: PDF Hammer
- Best mobile experience for grading on the go: iLovePDF or Smallpdf
The picks at a glance
| Tool | Price | Where files are processed | Account required |
|---|---|---|---|
| PDF Hammer | Free to start | 7 of 9 tools run locally in your browser. Word and Excel conversion use a secure, temporary server-side converter that deletes the file after. | Required for every tool |
| iLovePDF | Free (ads, limited tasks); Premium about $5-7/mo (~€5/mo annual, €9/mo monthly); Business custom | Server-side. Files are automatically deleted within 2 hours, or immediately if you click delete. | Not required for quick free tasks |
| Smallpdf | Free (capped around 2 tasks/day); Pro about $9-10/mo billed annually ($15/mo monthly); Team from about $7-8/user/mo | Server-side, on EU infrastructure. Files are deleted after 1 hour unless you deliberately save them to a Smallpdf account. | Not required for occasional free use |
| Sejda | Free (3 tasks/day, 200-page and 50MB limits); Web Monthly about $7.50/mo; Desktop+Web Annual about $63/yr | Sejda Web runs on Sejda’s servers. Sejda Desktop (a separate download, included with the Annual plan) processes files entirely on your computer. | Not required for free web tasks |
| Adobe Acrobat (online tools) | No lasting free plan for editing (limited free tools only); Standard about $13-15/mo; Pro about $20/mo; Studio about $25/mo | Cloud (Adobe Document Cloud). Every tool, free or paid, uploads your file to Adobe’s servers. | Adobe account required |
| PDF24 | Free, with no paid tier at all | The web tools run on PDF24’s servers (Berlin-based Geek Software GmbH), with files deleted within 1 hour. A separate free desktop app, PDF24 Creator, processes files fully offline on Windows. | Never required |
Tool by tool
PDF Hammer
Merge worksheets into a packet, fix a sideways scan, or compress a file for your school’s upload portal, all locally and free to start. You’ll need to create an account, which a quick one-off tool skips.
iLovePDF
No account needed for a quick task, plus a mobile app that’s handy for reviewing student submissions between classes.
Smallpdf
Clean interface and a usable mobile experience; the free tier’s roughly 2-tasks-a-day cap shows up fast during report card season.
Sejda
Decent free option for occasional use, but the 3-tasks-a-day cap is the tightest here for a teacher grading a stack of scanned work.
Adobe Acrobat (online tools)
Not worth it unless your district already provides a license, the subscription cost doesn’t match typical classroom PDF needs.
PDF24
Completely free, no account, which matches how most teachers actually want to use a PDF tool: in, done, out.
My pick
For most classroom tasks, PDF24 or iLovePDF’s free tools are the path of least resistance, no account, no cost. If you’re assembling a test you’d rather not have pass through anyone else’s server before it’s handed out, that’s where PDF Hammer fits.
What I’d do today
- 01
Use PDF24 or iLovePDF for routine worksheet merging and compressing, no account needed.
- 02
Keep PDF Hammer for anything you’d rather not upload, like an unreleased test or quiz.
- 03
Compress scanned packets before uploading to a school portal with a file size limit.
Frequently asked questions
Do I need an account to merge PDFs as a teacher?
Not with PDF24 or iLovePDF for a quick task. PDF Hammer requires a free account for every tool.
What’s the safest way to handle an unreleased test?
PDF Hammer processes merge, compress, and organize locally in your browser, so the file doesn’t get uploaded anywhere for those tasks.
Is there a mobile-friendly option for grading on the go?
iLovePDF and Smallpdf both have mobile apps; PDF Hammer currently doesn’t.