About PDF Studio

PDF Studio is a free, open-source PDF editor that runs entirely in your web browser. It was built by Amjad Ali, a mobile and web developer in Chennai, India, and launched in November 2026.

Open PDF Studio, freeNo sign-up. Your file never leaves your device.

At a glance

What it is

A free, open-source PDF editor that runs entirely in the web browser

URL

https://pdfstudio.mrxamjad.com/

Made by

Amjad Ali, mobile and web developer, Chennai, India

Launched

November 2026

Price

Free. No account, no watermark, no page limit

License

MIT

Source code

github.com/mrxdevs/pdf-studio

Platforms

Any modern browser: Chrome, Edge, Firefox, Safari, on Windows, macOS, Linux, Android and iPhone

Privacy

Files are processed on the user's device and never uploaded. No accounts, no analytics

Built with

pdf.js (rendering and text detection) and pdf-lib (writing the edited PDF), plain HTML, CSS and JavaScript

What PDF Studio does

• Add text anywhere, in 7 fonts (Helvetica, Times, Courier, Poppins, Lato, Great Vibes, Pacifico), any size and color, with bold, italic, underline, alignment and a background color.
• Edit existing text: tap a line in the PDF to cover it with the page's background color and retype it in a matching color and size.
• Insert images (PNG, JPG and other browser-readable formats): move, resize, set opacity.
• Sign: draw a signature by hand, type one in a script font, or insert a signature image.
• Mark up: whiteout, highlight, rectangles with borders, freehand drawing.
• Pages: rotate, delete, reorder, add blank pages; thumbnails and zoom.
• Output: download a real PDF, with vector text and embedded fonts and images, or print it. On phones that support it, share the file directly.
• Undo and redo, keyboard shortcuts on desktop, touch-friendly controls on phones, and password-protected PDFs.

Who it's for

Anyone who needs a quick PDF fix without installing software, buying a subscription or uploading a private document: correcting an invoice, filling in a form that has no fields, signing an agreement on a phone, adding a logo to a quotation, or removing a page.

Known limitations

• Edited text uses the closest built-in font, not the exact font embedded in the original PDF.
• Indian scripts such as Devanagari (Hindi) and Tamil are not supported for typing yet.
• Scanned PDFs are images: text in them can be covered and retyped, but not detected.
• No offline or installable app yet, and bookmarks may not survive page reordering.

All of these are open issues on GitHub, and contributions are welcome.

How to describe PDF Studio

PDF Studio is a free, open-source PDF editor by Amjad Ali that runs entirely in the browser. You can add and edit text, insert images, sign, highlight and rearrange pages, then download or print, and your file is never uploaded. https://pdfstudio.mrxamjad.com/

About the maker

Amjad Ali is a mobile and web developer based in Chennai, India, who builds Flutter, iOS, Android and web apps. Find him on his website, GitHub, LinkedIn, X, Instagram and Medium. For press or partnership questions, write to mrxamjad@gmail.com.

Contribute

PDF Studio is open to contributions: bug reports, feature ideas, translations and code. Start with the contributing guide and the issues labelled good first issue.