Are these PDF tools free?

Yes. All PDF tools on Stax are completely free with no daily limits, no watermark added to your files, and no sign-up required.

Are my PDFs uploaded to a server?

No. All PDF processing runs entirely in your browser using PDF-lib and PDF.js. Your files are never sent to any server, so your documents stay 100% private.

Is there a file size limit?

There is no hard server-side limit since files never leave your browser. Very large PDFs (100 MB+) may be slow depending on your device's RAM and CPU.

Which PDF tools are available?

Stax includes a PDF merger, splitter, compressor, page rotator, watermark tool, page number adder, page info inspector, and image-to-PDF converter.

Can I use these PDF tools on mobile?

Yes. All PDF tools are responsive and work on Android and iOS browsers. Processing speed depends on your device's capabilities.

Free PDF Tools

PDF tools let you merge, split, compress, watermark, rotate pages, add page numbers, and convert images to PDF — all inside your browser. No file is ever uploaded to a server, so your documents stay completely private. Works on desktop and mobile with no daily limits or file size caps.

12 tools available

Most Popular

Image to PDF

Convert JPG, PNG, and WebP images to a PDF. Multi-page support, page size selection (A4/A3/Letter/fit), and image fit modes.

Try it free →PDF Merger

Combine multiple PDF files into one document. Upload, reorder, and download the merged PDF. 100% client-side.

Try it free →PDF Splitter

Split a PDF by page ranges, every N pages, or extract specific pages. Each part downloads as a separate file.

Try it free →

All PDF Tools (12)

Image to PDF

Convert JPG, PNG, and WebP images to a PDF. Multi-page support, page size selection (A4/A3/Letter/fit), and image fit modes.

Open tool →PDF Merger

Combine multiple PDF files into one document. Upload, reorder, and download the merged PDF. 100% client-side.

Open tool →PDF Splitter

Split a PDF by page ranges, every N pages, or extract specific pages. Each part downloads as a separate file.

Open tool →PDF Page Rotator

Rotate all or specific pages in a PDF by 90°, 180°, or 270°. Fix scanned documents with incorrect orientation.

Open tool →PDF Watermark

Add a text watermark to every page of a PDF. Customise position, angle, font size, color, and opacity.

Open tool →PDF Page Numbers

Add page numbers to PDF files. Choose position, format (Page 1 of 10, 1/10), font size, and starting number. Skip cover page option.

Open tool →PDF Page Info

Inspect PDF metadata (title, author, creator), page count, and individual page dimensions in pt and mm.

Open tool →PDF Compressor

Reduce PDF file size using lossless object-stream compression and metadata stripping. No quality loss.

Open tool →Smallpdf Alternative

Smallpdf vs Stax PDF Tools — 8 PDF utilities running in your browser. No daily limit, no upload, no signup, no paywall.

Open tool →Adobe Acrobat Alternative

Adobe Acrobat vs Stax PDF Tools — 8 PDF utilities (compress, merge, split, watermark, page numbers, image-to-PDF, encrypt) free, browser-only, no subscription.

Open tool →TinyWow Alternative

TinyWow alternative with 230+ free browser-based tools — PDF, image, developer, finance, AI writing. No upload, no signup, no daily limits.

Open tool →iLovePDF Alternative

iLovePDF alternative: compress, merge, split, watermark, rotate PDFs and more — all 100% in your browser. No upload, no signup, no file size limits.

Open tool →

Frequently Asked Questions

Are these PDF tools free?: Yes. All PDF tools on Stax are completely free with no daily limits, no watermark added to your files, and no sign-up required.
Are my PDFs uploaded to a server?: No. All PDF processing runs entirely in your browser using PDF-lib and PDF.js. Your files are never sent to any server, so your documents stay 100% private.
Is there a file size limit?: There is no hard server-side limit since files never leave your browser. Very large PDFs (100 MB+) may be slow depending on your device's RAM and CPU.
Which PDF tools are available?: Stax includes a PDF merger, splitter, compressor, page rotator, watermark tool, page number adder, page info inspector, and image-to-PDF converter.
Can I use these PDF tools on mobile?: Yes. All PDF tools are responsive and work on Android and iOS browsers. Processing speed depends on your device's capabilities.