I've used PDFs for years, and it always bugged me how heavy most PDF tools have become.

Reading one doc, fixing a typo, or scanning a file should be quick — not "open a hundreds-of-MB app first".

So I built **Arc PDF**, a native macOS app that's only **11.6 MB** powered by **Swift + PDFium**.

What fits in that size:

* **Reading & annotating** — highlight, underline, notes, drawing
* **Real editing** — change text like in a Word doc (fix typos, add paragraphs, adjust fonts); add / replace / resize images
* **Page management** — add, delete, rotate, reorder pages
* **OCR** — makes scanned PDFs searchable again
* **AI** — summarize, translate, extract tables, generate a TOC, or chat with your document. You plug in **your own** model (OpenAI / Claude / DeepSeek API key) — no subscription to my backend.

All of that in 11.6 MB. The trick is no heavy framework: it talks to the PDF format directly, so each feature stays lean instead of bloated.

To be upfront about the edges: forms, shape annotations, and e-signatures aren't there yet.

Right now it's **completely free** — I'd rather more people get to try it than put it behind a paywall.

It's also a side project I built *\*mostly with AI coding\** — which is fitting, since the app itself edits PDFs *\*and\** was built with AI.

Mac App Store: [Arc PDF on the Mac App Store](https://apps.apple.com/us/app/arc-pdf-pdf-editor-ai/id6670330650?mt=12)

Open to feedback, bugs, and feature ideas. What's the one thing you hate most about dealing with PDFs?

iPhone and iPad versions are coming soon — stay tuned!

I made an 11.6 MB PDF app that reads, annotates, edits, OCRs, and does AI — free on the Mac App Store