Adobe Illustrator opens PDFs as fully editable vector files. For designers reworking the underlying design — colours, paths, typography as design elements — it's the right tool. For someone who needs to fix a typo or sign a contract, it's massive overkill.
What Illustrator does
Illustrator opens PDFs page-by-page as vector documents. Every path, every text frame, every image is editable individually. Powerful for designed-PDF rework: rebranding a brochure, updating typography in a poster, editing infographic content.
The trade-off: complexity. Illustrator's learning curve and price are out of proportion for simple PDF edits.
When Flint is the better fit
Everyday PDF tasks: fix text, sign, merge, split, compress, convert. Flint does all of these in a browser tab without an Adobe subscription. For PDFs that aren't 'designed documents to redesign', this is the right path.
Hybrid workflows
Designers sometimes use both — Illustrator for the design rework, Flint for everyday text fixes or signatures on the final PDF. Use Illustrator when you're editing the design; use Flint when you're editing the document.
FAQ
Can Illustrator edit any PDF?
It opens any PDF as editable vector art, but multi-page PDFs need to be opened page-by-page. Long documents are awkward. Designed PDFs (brochures, posters) work well; scanned PDFs less so.
Will Illustrator preserve PDF fidelity?
Mostly — text and vector graphics survive. Some advanced PDF features (forms, JavaScript, attachments) may not translate. For designed visual documents, fidelity is high.
Is Flint a designer tool?
Not for graphic design. For PDF document editing — text changes, signatures, merging — it's the right fit. For redesigning the visual layout of a PDF, Illustrator wins.
Illustrator for design rework, Flint for document edits. Different jobs.