Articles
The Flint PDF library
Short, practical pieces on PDFs — fixing a typo, signing a contract, getting a file under 25 MB, picking the right format, dealing with awkward scans. 965 articles and counting.
How to Compress a Photo PDF (Scans, Photographic Documents)
Compress scanned or photo-based PDFs — IDs, contracts, photographic documents — without losing clarity.
3 minReadHow to Compress a Pitch Deck for Email
Shrink your pitch deck to under 10MB for email without making the visuals look like a 2010 startup deck.
3 minReadHow to Compress an MLS Photo Pack Without Losing Quality
Shrink an MLS photo pack PDF for email and handouts without making your high-end property look like budget housing.
3 minReadHow to Compress Medical Imaging PDFs Without Losing Diagnostic Detail
Compress medical imaging PDFs for sharing without sacrificing the detail clinicians need to interpret images.
4 minReadHow to Compress Multiple PDFs at Once
Compress whole folders of PDFs in one go — same settings applied across the batch.
3 minReadHow to compress a PDF in Chrome
Compress PDFs in Chrome via Flint. Drag in PDF, pick quality, download smaller file. 30 seconds.
3 minReadHow to compress a PDF on Chromebook
Compress PDFs on Chromebook in Chrome. Turn huge scans into emailable files in seconds.
3 minReadHow to compress a PDF on Linux
Compress PDFs on Linux two ways — Flint in the browser for one-offs, Ghostscript for scripted batches.
4 minReadHow to Compress Portfolio PDFs Without Killing the Work
Compress your portfolio PDF for email without making your design work look like the work of a cheaper designer.
3 minReadHow to Compress Property Photos in a PDF Without Killing Quality
Shrink heavy property photo PDFs to email-friendly size without making your living rooms look like they were photographed in 2008.
3 minReadHow to confirm redaction actually worked
Trust nothing, verify everything. The 30-second redaction verification process.
3 minReadHow to Convert a Static PDF Into a Fillable Form
Turn a flat PDF — a scanned form, a Word export, a static template — into a fillable form anyone can complete on screen.
4 minReadHow to Convert Handwritten Notes Into a PDF
Turn handwritten notes — meeting scribbles, lecture pages, journal entries — into a searchable PDF.
4 minReadHow to Convert Invoices from PDF to Excel
Turn PDF invoices into Excel rows you can sum, sort, and import into your accounting software.
4 minReadHow to convert a PDF on an Android phone
Convert PDFs to Word, images, and back on Android in Chrome. No Adobe, no Play Store install.
4 minReadHow to convert a PDF on iPhone
Convert PDFs on iPhone to Word, images, and back. Browser-based, fast, and free — no Adobe sign-in.
4 minReadHow to convert a PDF on Mac
Convert PDFs on Mac to Word, images, or back. Preview converts to images natively; Flint adds Word and reverse conversion.
4 minReadHow to convert a PDF on Windows
Convert PDFs on Windows to Word, images, or back. Browser-based, free, works in Edge or Chrome.
4 minReadHow to Convert Receipts to PDF for Expense Reports
Convert receipt photos into a single tidy PDF for expense reports — with OCR for searchable text and tidy naming.
3 minReadHow to Copy Text From a Locked or Restricted PDF
Extract text from a PDF with copy restrictions — when you have the right to — using unlock, OCR, or re-export.
3 minReadHow to Create a Blank PDF for Forms, Notes, and Templates
Create a blank PDF — single page or multi-page — in any standard size, for use as a template, form base, or note page.
3 minReadHow to Create a PDF From a Website or Web Page
Save any web page as a PDF — full page or selected area — for archiving, sharing, or offline reading.
3 minReadHow to Create a PDF From Photos in Order
Combine a set of photos into one PDF, in the order you choose, with rotate and compress along the way.
3 minReadHow to Create a PDF Portfolio of Your Work That Gets Opened
Build a polished PDF portfolio of your work — what to include, how to sequence it, how to keep the file small enough to actually send.
4 minReadHow to Create a PDF Quiz for Print or Distribution
Build a PDF quiz that prints cleanly, distributes by email, and includes a matching answer key for marking.
4 minReadHow to Crop a PDF to Remove Unwanted Margins or Content
Crop pages in a PDF — remove margins, strip headers, trim unwanted areas — across all pages or per page.
3 minReadHow to deal with PDFs as a non-techie
A short, friendly guide for anyone who'd rather just get the PDF done.
3 minReadHow to deal with PDFs when the attachment is too big
Three ways to get a big PDF through a tight email limit.
3 minReadHow to deal with PDFs when the file won't open
A short checklist for the moment a PDF point-blank refuses to open.
3 minReadHow to deal with PDFs when the password is lost
What you can and can't recover when a PDF password vanishes.
3 minReadHow to deal with PDFs when you can't edit them
Three reasons a PDF won't let you edit, and the right fix for each.
3 minReadHow to deal with PDFs when you don't have a printer
Skip the printer entirely — every PDF task has a paper-free version.
3 minReadHow to deal with PDFs when you only have a phone
Full PDF kit, screen the size of your hand.
3 minReadHow to deal with PDFs without Acrobat
Skip the Acrobat subscription and still get every PDF job done.
3 minReadHow to deal with PDFs without installing anything
PDFs in your browser only. No installs, no admin, no fuss.
3 minReadHow to deal with PDFs without paying
Free PDF tools that genuinely cover daily needs — and where paying makes sense.
3 minReadHow to Decide What PDF Format to Use
Standard PDF, PDF/A, encrypted, flattened — which to use when. A simple decision guide for everyday choices.
3 minReadHow to Decide When to Archive a PDF
Knowing when to archive vs keep in working is mostly about three triggers. Here are the rules that prevent the working folder from bloating.
3 minReadHow to Decide When to Delete a PDF
Deleting PDFs requires more care than archiving. A short framework for when to delete safely and what to keep forever.
3 minReadHow to delete uploaded PDFs permanently
Delete-from-UI rarely means delete-from-everywhere. The honest workflow for permanent removal.
4 minReadHow to Deskew a Scanned PDF for Clean, Straight Pages
Straighten skewed scans so pages sit level — improves OCR accuracy and document quality.
3 minReadHow to Detect Whether a PDF Has Been Tampered With
Identify whether a PDF has been altered since it was created or signed — signature integrity, metadata checks, version history.
4 minReadHow to Digitally Sign a PDF With a Verifiable Signature
Add a real, verifiable digital signature to a PDF — not just a pasted image, but a cryptographic signature with an audit trail.
4 minReadHow to Duplicate a Page in a PDF (One or Many Times)
Duplicate one or more pages in a PDF — for template pages, repeated forms, or content batching.
3 minReadHow to edit a PDF in Arc browser
Arc is Chromium-based and runs Flint cleanly. Edit PDFs in Arc with the same browser-based flow as Chrome.
3 minReadHow to edit a PDF in Brave
Brave is Chromium-based and runs Flint cleanly. Edit PDFs in Brave with the same privacy benefits Brave gives elsewhere.
3 minReadHow to edit a PDF in Chrome
Chrome opens PDFs but doesn't edit them. Flint adds full editing in the same browser. No extension required.
3 minReadHow to edit a PDF in Edge
Edge has the best built-in PDF reader of any browser. For real edits, pair it with Flint in another tab.
3 minReadHow to edit a PDF in Firefox
Firefox has improved PDF editing recently but still doesn't edit text. Flint covers it in the same browser tab.
3 minReadHow to edit a PDF in Safari
Safari opens PDFs cleanly but doesn't edit them. Flint adds editing in the same Safari tab. No extension.
3 minReadHow to edit a PDF on Android
Edit PDFs on Android directly in Chrome. Real text edits, signatures, page changes — no app from the Play Store.
4 minReadHow to edit a PDF on Chromebook
Chromebooks have basically nothing built in for PDFs. Flint in Chrome fills the gap — edit, sign, merge, free.
4 minReadHow to edit a PDF on iPad
Edit PDFs on iPad in Safari, with the bigger screen making real text edits actually pleasant. No Pencil required.
4 minReadHow to edit a PDF on iPhone
Edit PDFs directly in Safari on iPhone, no App Store detour and no Acrobat sign-in. Add text, fix typos, sign, and re-save in minutes.
4 minReadHow to edit a PDF on Mac
Edit PDFs on Mac in your browser. Real text edits, signatures, page changes — no Acrobat subscription.
4 minReadHow to edit a PDF on Windows
Edit PDFs on Windows in your browser. Real text edits, signatures, page management — no Acrobat subscription.
4 minReadHow to edit a PDF with Mac Preview
Preview handles annotation, signing, and page management beautifully. For real text edits, use Flint as the second step.
4 minReadHow to Edit a PDF Without Acrobat (Free Browser Alternatives)
Edit PDFs without Adobe Acrobat — text edits, page operations, forms, signatures. All in a browser, all free.
4 minReadHow to edit a PDF exported from QuickBooks
Edit QuickBooks-exported PDFs in Flint. Add notes to invoices, sign reports, merge statements into packs.
3 minReadHow to edit a PDF from Box
Edit PDFs from Box cloud storage. Download, edit in Flint, upload back. Simple two-tab flow.
3 minRead