All-in-One Online PDF Toolkit

Free Online PDF Tools that run in your browser

Merge, split, compress, convert, edit, protect and sign PDF files with OmniPDF. Every document is processed locally on your device — nothing is uploaded to a server. No installation, no account, no hidden limits.

Merge PDF now Compress a PDF
  • 100% browser-side
  • 100+ tools
  • No sign-up

The tasks people open OmniPDF for most often — each one runs fully in your browser.

Browse PDF tools by category

Eight focused categories cover the whole document workflow, from organising pages to running OCR.

How OmniPDF works

Three steps, no account, nothing sent to a server. The work happens on your device.

  1. Choose a tool

    Pick from over one hundred PDF tools. Every tool page loads only the libraries it actually needs.

  2. Add your files

    Drag and drop or browse to add PDFs. OmniPDF validates file type, size and password protection before processing.

  3. Process in your browser

    Heavy work runs inside Web Workers so the interface stays responsive. When the result is ready it downloads straight to your device.

Privacy by design — your files never leave your device

Most online PDF tools upload your document to a server, process it there, and then download the result back to you. OmniPDF takes the opposite approach. When you open a tool, the JavaScript and WebAssembly libraries needed to process the file are already loaded into your browser. From that point on, everything — parsing, editing, rendering, saving — happens inside your own tab.

That means your contract, medical report, invoice, ID scan or confidential report never touches an OmniPDF server. There is no upload, no storage bucket, no processing queue, and no third-party processor that sees your files. When you close the tab, the working data is gone.

  • No uploads. The file stays on your disk the whole time.
  • No accounts. You never create a login, so there is nothing to breach.
  • No tracking of content. Analytics (when enabled) records only tool names and success/failure events, never document contents or filenames.
  • No hidden retention. Object URLs and temporary blobs are revoked as soon as a download finishes.
Read the full security overview

Supported formats

OmniPDF reads and writes the formats people actually use for document work.

  • DocumentsPDF, DOCX, XLSX, PPTX, TXT, CSV, HTML
  • ImagesJPG, JPEG, PNG, WebP, SVG, GIF, BMP, TIFF
  • Output archivesPDF, DOCX, XLSX, PPTX, JPG, PNG, WebP, TXT, HTML, ZIP
  • StandardsPDF 1.4–1.7, encrypted PDFs with known passwords, tagged PDFs preserved where supported

Why people choose OmniPDF

A serious PDF toolkit built around privacy, speed and honest limitations — not inflated claims.

  • Truly private

    Files are processed locally with JavaScript and WebAssembly. There is no server receiving your document, ever.

  • Fast on low-end devices

    Library loading is lazy and per-tool. The homepage ships under 80 KB of JavaScript, so phones load it instantly.

  • No accounts, no watermarks

    You do not need to sign up, verify an email or accept a watermark to download the result.

  • Honest limits

    When a feature cannot work well in a browser, the tool page says so before you upload a file.

  • Works offline (for cached tools)

    OmniPDF installs as a Progressive Web App. Cached tools keep working without a network.

  • No language barriers

    Plain English, clear labels and accessible markup so the tools work for everyone.

What you can do with OmniPDF

Common real-world tasks, each mapped to a dedicated tool that solves it in one click.

Prepare documents for submission

Merge scanned contracts, reorder pages, add page numbers and headers, then compress the file so it fits an upload limit.

Merge · Page numbers · Compress

Convert between formats

Turn a Word proposal into a signed PDF, or convert PDF invoices back to editable DOCX files for accounting.

Word to PDF · PDF to Word · Sign

Organise a large file

Split a 300-page report into logical chapters, delete blank pages, rotate sideways scans and extract the pages you need.

Split · Delete pages · Extract

Protect sensitive information

Password-protect confidential PDFs, redact visible text, and remove metadata before sending to a third party.

Protect · Redact · Metadata

Digitise paper documents

Photograph pages with a phone, convert them to PDF, run OCR and make the text selectable and searchable.

JPG to PDF · OCR · Searchable PDF

Publish to the web

Convert PDF flyers to JPG images, render single pages as WebP for social sharing, or export text to HTML for a blog post.

PDF to JPG · PDF to WebP · PDF to HTML

Hand-picked tools worth bookmarking, based on how often real visitors use them.

Frequently asked questions

Direct answers to the questions people ask most about free online PDF tools.

Is OmniPDF free to use?

Yes. Every tool on OmniPDF is free to use for personal and commercial documents. Optional advertising keeps the service running. There are no paywalled tools, no required accounts and no download watermarks.

Are my PDF files uploaded to a server?

No. OmniPDF processes PDF files locally inside your browser using JavaScript and WebAssembly. Documents are never uploaded to OmniPDF servers. When you close the tab, temporary data created during processing is discarded.

How do I merge PDF files online?

Open the Merge PDF tool, drag your files into the upload area, drag the file cards to reorder them, then click Merge PDF. The combined file downloads instantly to your device.

Can OmniPDF compress a PDF to an exact size like 100KB or 200KB?

OmniPDF can aggressively downsample images and recompress streams to reach small targets, but no browser tool can guarantee an exact byte size for every PDF. If a target is unreachable without destroying quality, OmniPDF reports the smallest size achieved instead of claiming success.

Does OmniPDF work on mobile phones and tablets?

Yes. OmniPDF is built mobile-first and runs on modern Android and iOS browsers, including Chrome and Safari, with layouts tested from 320px wide screens upward.

Which PDF tools are available on OmniPDF?

OmniPDF includes more than one hundred tools across eight categories: organize, compress, convert to and from PDF, edit, security, page layout, OCR and image extraction. See the full tool catalogue.

Is it safe to use OmniPDF for confidential documents?

Because processing runs inside your browser, OmniPDF never receives a copy of your files. Confidential documents stay on your device the whole time, and nothing is stored after the tab is closed.

Can OmniPDF remove a password from a PDF I own?

Yes, if you already know the password. OmniPDF decrypts the PDF in the browser after you type the password, then saves an unlocked copy. OmniPDF cannot and will not crack unknown passwords.

Can I convert a scanned PDF to Word?

Yes, with two steps. First run OCR PDF to recognise the text in the scan, then convert the OCR result to DOCX with the PDF to Word tool. OCR accuracy depends on scan quality and language.

Is a PDF signature from OmniPDF legally binding?

A drawn or uploaded signature from OmniPDF is an electronic signature, not a certified digital signature with a certificate authority. Many contracts accept simple electronic signatures, but for legal certainty in high-value or regulated agreements, use a qualified digital signature service. OmniPDF does not claim to replace those services.

How do I add page numbers to a PDF?

Open the Add Page Numbers tool, choose a position and format such as "Page 1 of 20", select which pages to number, then click Add Page Numbers. The updated PDF downloads to your device.

What browsers does OmniPDF support?

OmniPDF supports current versions of Chrome, Edge, Firefox and Safari on desktop and mobile. Older browsers or browsers with JavaScript disabled cannot run the tools because processing happens locally in the browser.

PDF guides and tutorials

Original, practical guides written to answer the questions people search for most.

Read all guides

Ready to work on a PDF?

Pick a tool and drop your file. Everything happens in your browser — no upload, no account, no waiting in a queue.

Browse all tools See how it works