Free Online PDF Tools

Merge, split, compress, rotate and convert PDF files in seconds. Everything runs in your browser — your documents are never uploaded.

✓ No upload✓ No sign-up✓ No watermarks✓ Up to 50 MB

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Merge PDF

Combine multiple PDF files into one document. Reorder files before merging. Free, fast and private — PDFs are merged in your browser, never uploaded.

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JPG to PDF

Convert JPG, PNG and WebP images into a single PDF. Reorder images, choose A4, Letter or fit-to-image pages and margins. No upload, no watermark.

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PDF to Word Converter

Convert text-based PDFs to editable Word (.docx) with paragraphs, headings, bold and italics preserved. Runs entirely in your browser — no upload.

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PDF to JPG

Convert PDF pages to high-quality JPG or PNG images at 72–300 DPI. Pick pages, preview and download individually or as a ZIP. 100% in-browser.

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Split PDF

Extract page ranges from a PDF or split it into separate files every N pages, downloaded as a ZIP. Runs in your browser with no upload.

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Sign PDF

Sign PDF documents online: draw, type or upload your signature, place it on any page, resize it and download the signed PDF. Nothing is uploaded.

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Rotate PDF

Rotate all pages or individual pages of a PDF by 90°, 180° or 270° with visual thumbnails, then download the fixed file. Free and private.

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Text to PDF Generator

Type or paste plain text and generate a printable PDF via your browser's print dialog. Choose A4/Letter, font size, margins, and line height. Plain text only — not a .docx converter.

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Delete PDF Pages

Remove unwanted pages from a PDF: click thumbnails or type page ranges, then download the cleaned document. Processed locally in your browser.

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Organize PDF

Reorder, duplicate and remove PDF pages with drag-and-drop thumbnails, then save the rearranged document. Free and processed in your browser.

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PDF to Text

Extract plain text from PDF files page by page. Copy it or download a .txt file. Detects scanned PDFs that need OCR. Runs locally, no upload.

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Add Page Numbers to PDF

Number PDF pages with your choice of position, format (1, Page 1 of N), start number and font size. Skip the cover page. Runs in your browser.

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PDF Compressor

Compress PDF files in your browser: lossless optimization or strong image compression for scans. Never larger than the original, never uploaded.

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Word to PDF Converter

Upload a .docx Word file and convert it to PDF directly in your browser. No server upload, no account required.

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Watermark PDF

Add a text watermark such as CONFIDENTIAL or DRAFT to PDF pages. Control size, opacity, rotation, color and tiling. No upload required.

Why Process PDFs in Your Browser?

Most online PDF services upload your file to their servers, process it there and keep a copy for a period of time. That is a real risk for contracts, payslips, medical reports or anything with personal data. StackUtils PDF tools take a different approach: the processing code is downloaded to your browser and runs on your own device. The file is read from your disk, transformed in memory and saved straight back to your downloads folder. Nothing is sent over the network.

Under the hood we use two mature open-source libraries: pdf-lib to create and modify PDF documents (merging, splitting, rotating, stamping text) and Mozilla's pdf.js — the engine inside Firefox's PDF viewer — to read and render pages as images.

Which PDF Tool Do I Need?

Several files into one: use Merge PDF. To go the other way, Split PDF extracts ranges or breaks a document into parts.
File too big for email: Compress PDF. Scanned documents shrink the most.
Pages upside down or in the wrong order: Rotate PDF and Delete PDF Pages.
Photos or scans to a document: JPG to PDF. Need images out of a PDF? PDF to JPG.
Editing the text: PDF to Word turns text-based PDFs into editable .docx; Word to PDF does the reverse.
Before sharing a draft: Watermark PDF and Add Page Numbers.

Tips for Working with PDFs

Scanned vs. digital PDFs: a scanned PDF is a picture of a page. It can be merged, rotated and compressed, but its text cannot be edited or copied without OCR.
Order of operations: merge first, then delete or rotate pages, add page numbers last so the numbering matches the final document, and compress at the very end.
Keep the original: every tool creates a new file, so your source PDF is never modified.

Frequently Asked Questions

Are these PDF tools really free?

Yes. Every PDF tool on StackUtils is free with no sign-up, no daily limits and no watermarks added to your files.

Are my PDF files uploaded to a server?

No. Merging, splitting, compressing, rotating and converting all happen inside your browser using pdf-lib and pdf.js. Your documents never leave your device, which makes the tools safe for contracts, invoices and other private files.

Is there a file size limit?

Files up to 50 MB are supported. Because processing uses your device's memory, very large or image-heavy PDFs are faster on a desktop computer than on a phone.

Can I edit password-protected PDFs?

No. Encrypted PDFs cannot be opened without the password. Remove the protection in your PDF reader first, then use any of the tools.

Do the tools work offline or on mobile?

They work in any modern browser — Chrome, Edge, Firefox and Safari on desktop, Android and iOS. Once a page has loaded, processing does not need the network.