Back to Morphix File Converter

PDF Converter

PDF Converter — every PDF tool, in your browser

Convert files to PDF, pull PDFs back into Word, Excel or images, and merge, split, compress or protect them. Everything runs locally — no upload, no signup, no watermark.

Drop files here

or browse from your device

images · audio · video · documents · archives · up to ~500MB

Stays on your device

Converted in the browser tab.

No queue

No server roundtrip or waiting list.

Offline-ready

Works after the first load.

Convert to PDF

Turn images, documents and markup into a clean, shareable PDF.

Convert from PDF

Get your content back out of a PDF in an editable format.

Edit & optimise PDF

Reorganise, shrink and secure PDFs without leaving the page.

Ebooks to PDF

Read ebooks anywhere by converting them to a fixed-layout PDF.

Step-by-step PDF guides

How a browser-based PDF converter works

Traditional online PDF converters upload your document, process it on a shared machine and email or link you the result. That means a copy of your contract, payslip or medical record sits on someone else's disk, at least temporarily.

Morphix takes the other route. The PDF engines — pdf-lib for structural edits, pdf.js for rendering and text extraction, and WebAssembly builds for heavier work — are downloaded once into your browser and run on your own CPU. The file is read from your disk into memory, transformed, and handed straight back to you as a download. No request carries your document, so there is nothing to leak, delete or trust.

The honest trade-off: very large files depend on the memory your browser can allocate, and PDF to Word or Excel rebuilds content rather than reproducing complex layouts pixel-perfectly. For scanned documents, OCR runs first — also locally.

Frequently asked questions

What is the best free PDF converter?
The best PDF converter is the one that does not ask you to hand over your document. Morphix converts to and from PDF entirely inside your browser tab, so contracts, invoices and medical records are never uploaded. It is free, requires no account and adds no watermark.
How do I convert a file to PDF?
Drop your file into the converter above, choose PDF as the target format and click Convert. Morphix reads the file locally, builds the PDF in your browser and gives you a download link within seconds.
Can I convert a PDF back to Word or Excel?
Yes. PDF to Word extracts the text and rebuilds it as a DOCX you can edit, and PDF to Excel pulls tabular data into a spreadsheet. Complex layouts and scanned pages are approximations — for scans, use the Scanned PDF to Word tool, which runs OCR first.
Are my PDF files uploaded to a server?
No. Every PDF tool on this page runs client-side with WebAssembly and browser APIs. You can confirm it yourself: open the Network tab in developer tools and convert a file — no request carries your document.
Is there a file size limit?
There is no artificial cap; the practical limit is how much memory your browser can allocate for one file. Free accounts convert files up to 500 MB and 5 files per batch, Pro raises that to 5 GB and 250 files.
Does the PDF converter work offline?
Yes, for most tools. Once the page and its conversion engine have loaded, you can disconnect from the internet and keep converting, since nothing is sent anywhere.