7 Best Free Online PDF Tools Compared (2026)

You search "merge PDF free" and Google hands you a dozen sites that all look the same. Each one claims to be free, fast, and secure. Half of them hit you with a paywall after your second file.

Here's an honest look at seven popular free online PDF tool sites — what they actually let you do without paying, where they cut you off, and which ones are worth bookmarking.

---

What we're comparing

Every site below offers some combination of merge, split, compress, rotate, convert, and other PDF operations. The differences come down to:

• What's genuinely free vs. what requires a paid plan
• Usage limits — daily task caps, file size limits, queue times
• Privacy — whether files get uploaded to a server or stay on your device
• Tool breadth — how many operations you can do without switching sites

We tested each on practical tasks: merging a 5-file packet, compressing a 12MB scan for email, extracting text from a report, adding page numbers to a 30-page document.

---

1. PDFShift

Free tools: 9 (merge, split, compress, rotate, watermark, page numbers, remove pages, reorder pages, extract text) Pro tools ($9/mo): PDF to Word, OCR, password protect, batch processing

PDFShift runs most operations directly in your browser. Your files don't get uploaded to a server for the free tools — the processing happens client-side using JavaScript. That's a meaningful privacy advantage if you're working with contracts, tax documents, or anything you'd rather not send to someone else's server.

The free tier has no daily task limits and no file queue. You can merge 20 PDFs, compress them, and add page numbers back to back without hitting a wall.

Where it's limited: the four Pro tools require the $9/month plan. If you need OCR on scanned documents or PDF-to-Word conversion, that's paid. But $9/month covers all four Pro tools with no per-task limits.

Best for: People who care about privacy and want unlimited free access to core tools.

---

2. Smallpdf

Free tier: 2 tasks per day across all tools Paid: $12/month (billed annually) or $18/month

Smallpdf has the most polished interface of any PDF tool site. It covers 20+ operations and the UX is genuinely well-designed — drag and drop works smoothly, previews load fast, and the output quality is consistent.

The catch is the two-tasks-per-day limit on the free plan. Merge a PDF and compress it — that's your daily allowance. Need to split something too? Come back tomorrow, or pay.

Files are uploaded to Smallpdf's servers for processing. They say files are deleted after one hour, which is reasonable but still means your documents leave your device.

Best for: Occasional use when you only need one or two tasks and don't mind the daily cap.

---

3. iLovePDF

Free tier: Most tools available with file size limits and watermarks on some outputs Paid: $7/month (billed annually)

iLovePDF offers a wide set of tools for free — merge, split, compress, rotate, convert, watermark, page numbers, and more. The free tier is more generous than Smallpdf's in terms of task count.

The limitations show up in file size caps (around 25MB for free users on some tools) and occasional watermarks on output files from certain operations. The batch processing is reserved for premium users.

Server-side processing. Files get uploaded, processed, and made available for download. Standard deletion policy after a few hours.

Best for: Budget-conscious users who need more daily tasks than Smallpdf allows and can live with size limits.

---

4. PDF24

Free tier: Everything is free, no limits Paid: None (ad-supported)

PDF24 is the wildcard on this list. Every tool is free. No task limits, no file size caps, no premium tier. It makes money through ads instead of subscriptions.

The tool selection is massive — over 30 operations. The interface is functional but dated compared to Smallpdf or PDFShift. Some tools feel like they were added to hit a number rather than because they work well. But for bread-and-butter tasks like merge, compress, and split, it gets the job done.

Files are processed server-side. The ad-supported model means you're looking at banner ads while your files process, but there's no upsell.

Best for: Users who refuse to pay anything and don't mind ads or a rougher interface.

---

5. Sejda

Free tier: 3 tasks per hour, 50MB file limit, 200-page limit Paid: $7.50/month

Sejda stands out for one specific capability: free online PDF editing. You can actually modify text inside a PDF without paying — something most competitors gate behind a paywall or don't offer at all.

The free tier limits are clear: 3 tasks per hour, files up to 50MB, documents up to 200 pages. For quick one-off tasks, these limits rarely matter. For batch work across many files, they add friction.

Best for: Anyone who needs to edit text directly inside a PDF without installing software or paying.

---

6. PDF Candy

Free tier: 1 task per hour, file size limits Paid: $6/month (billed annually)

PDF Candy offers a desktop app alongside its web tools, which is uncommon for free PDF sites. The web version covers the standard operations — merge, split, compress, convert — with a one-task-per-hour limit on free use.

The desktop app (Windows only) removes the hourly limit and works offline. If you're on Windows and process PDFs regularly, the desktop option adds genuine value that other sites don't offer.

Server-side processing for the web version. The desktop app processes locally.

Best for: Windows users who want a free desktop app with no task limits.

---

7. Adobe Acrobat Online

Free tier: Limited free tools (compress, convert to PDF, sign) Paid: $14.99–$24.99/month

Adobe offers a small set of free online tools — compress, convert to PDF from other formats, fill and sign, and a few others. The free versions work but come with restrictions (one file at a time, limited to a certain number of free uses per month).

The main reason to consider Adobe's free tools is if you're already considering a paid Adobe subscription. The free tier gives you a preview of the experience. But as a standalone free option, it's the most limited site on this list.

We wrote a detailed comparison of free tools vs. Adobe Acrobat if you're specifically weighing whether the subscription is worth it.

Best for: People already in the Adobe ecosystem who want a quick online option.

---

Quick comparison

Here's how the free tiers actually stack up:

• Most generous free tier: PDF24 (everything free, no limits)
• Best privacy: PDFShift (client-side processing, files stay on your device)
• Best interface: Smallpdf (polished UX, but only 2 free tasks/day)
• Best for editing: Sejda (free text editing inside PDFs)
• Most tools: PDF24 and iLovePDF (30+ operations each)
• Best value Pro tier: PDFShift at $9/month or iLovePDF at $7/month

---

The privacy question

This matters more than most comparison posts acknowledge. When you upload a PDF to a web tool, that file sits on someone else's server — even if only temporarily. For personal tax returns, signed contracts, medical forms, or business financials, "deleted after one hour" might not be good enough.

PDFShift processes most operations in your browser using client-side JavaScript. The file never leaves your computer. PDF24's desktop app also processes locally. Every other tool on this list uploads your files to remote servers.

If the document is sensitive, check whether the tool processes locally or server-side before uploading.

---

Pick the right tool for the task

There's no single best option — it depends on what you're doing:

• Quick merge or compress, no limits: PDFShift or PDF24
• Editing text in a PDF: Sejda
• One-off task with nice UX: Smallpdf
• Batch processing on a budget: iLovePDF or PDFShift Pro
• Everything free, ads okay: PDF24
• Already paying for Adobe: Use Adobe's online tools

Start with the free tier of whichever site matches your task. If free covers it, you're done. If not, you'll know exactly what you need to pay for.