You opened this from the filesystem. Browsers block PDF rendering workers on file:// —
run npm start (or npx serve) and open the served URL instead.
PDFStudio
100%
Edit-text mode.
Click any highlighted line to rewrite it. PDF Studio covers the original line with the sampled
page background and redraws your text in a matching font — so it works best on solid backgrounds.
Drop a PDF here
Everything happens locally in your browser. Your files are never uploaded anywhere.