    The video fills a W-9 in the browser, signs it, sets a password and flattens the form fields on save. Local PDF Studio is the offline PDF editor I build as a Chrome extension. Filling and signing were already in it; the rest of that flow is new.
    
    Flatten has three modes. Off keeps the fields interactive. Form fields bakes them into the page, text still selectable. Everything renders each page to a JPEG at 72, 150 or 300 DPI. With Off, the saved file now keeps a working form: copying pages into a new document carries the widgets but not the catalog /AcroForm, so it is rebuilt from the copied widgets' parent fields.
    
    The rest, mostly in the export menu the video opens:
    - pages to PNG, JPEG or WebP, or text to one .txt with page markers
    - AES-256 with separate open and owner passwords, plus permissions
    - "What's in this file": counts JavaScript, embedded files, XMP, properties, links and fonts before stripping
    - edit or delete the Info fields; removal deletes the XMP stream itself
    - page numbers with {n}, {total} and {filename}
    - blank page detection at 72 DPI, reviewed in a grid first
    - N-up, saddle-stitch booklet, resize to A4, Letter, Legal or A3
    - word-level compare with a second PDF, text only
    - the signature fonts in the Type tool, saved as glyph outlines
    - fixes: metadata survives flattening and encryption, protected files are never autosaved, laptop layout
    
    Chrome only.
    
    https://chromewebstore.google.com/detail/local-pdf-studio-offline/ocfegjfhboadmbpompimnbbpegjgoded
    
    When a filled form comes back to you, do you want it flattened or still fillable?

My in-browser PDF tool now flattens a form two ways or keeps it fillable (video: a W-9)