What are the best free AI tools?

OpenDesk offers 127 free AI tools including an AI slides maker, AI resume builder, PDF tools, image generator, code agent, SEO and writing tools.

Is there a free AI tool to create presentations?

Yes — OpenDesk's AI Slides Maker generates full presentations from a prompt for free.

What is the best free AI tool for coding?

OpenDesk's AI Code Agent generates, refactors and explains code across major languages, free to start.

Are SEO AI tools free?

OpenDesk includes 10 free AI-powered SEO tools for keyword ideas, meta tags, content briefs and on-page audits.

Is there a file-size limit?

100 MB per file, 500 MB combined output. Browser-only — no server upload, so larger files depend on your device's RAM.

Are my PDFs uploaded anywhere?

No. The merge runs entirely in your browser using pdf-lib. Nothing leaves your device.

Does it preserve form fields, annotations, and bookmarks?

Form fields and annotations are preserved per page. Bookmarks from the first file are kept; bookmarks from subsequent files are merged into a flat outline.

Can I merge password-protected PDFs?

Not currently — unlock them first with Unlock PDF.

All Tools

Merge PDF

PDF Master Suite

Easily merge multiple PDF documents into a single file. Drag and drop to reorder pages before merging.

100% Private — runs in your browser No signup for first 3 files

Free tier: 0/3 files used (rolling 30 days)3 left

Upload files

Drop files here or click to upload

PDF files

Result

Upload a file and click Process.

Files never leave your device. Powered by browser-native processing.

What Merge PDF does differently

Produces a ready-to-download file for merge pdf.
Runs 100% in your browser with pdf-lib — your merge PDF job never touches a server.
Controls: Upload PDF Files — each one changes the result meaningfully.
Batch-friendly: queue several documents and process them in a single pass.
Keeps page dimensions, embedded fonts and annotations byte-accurate.

Technical spec

RuntimeIn-browser (WASM)

PrivacyFiles never uploaded

OutputDownloadable file

Typical time< 3s per file

PDF Tools

Pairs well with

Split PDFSeparate PDF into multiple files

Remove PagesDelete specific pages from PDF

Extract PagesPull out specific pages from PDF

Organize PDFReorder PDF pages

Scan to PDFConvert scanned images to PDF

Compress PDFReduce PDF file size

How to use Merge PDF

Better than iLovePDF, Smallpdf

1
Upload your PDFs
Click the upload area or drag and drop. Up to 20 files, 100 MB each. Files are processed locally in your browser — nothing is uploaded to a server.
2
Reorder
Drag files to set the merge order. The top file becomes page 1 of the output.
3
Merge & download
Hit Merge — the combined PDF downloads instantly. Original files are never modified.