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.
Signing Legal Documents Online in the UK: What's Actually Valid
A plain-English guide to electronic signatures in the UK — what's valid, what needs witnessing, and how to sign without rework.
5 minReadSigning Legal Documents Online in the US: ESIGN, UETA, and Reality
A practical guide to ESIGN and UETA — what's valid, what isn't, and how to sign US legal documents online without rework.
5 minReadSigning Medical Consent Forms Online: What's Valid
What's required for valid online medical consent — and how to capture defensible evidence the patient signed knowingly.
4 minReadSigning Property Management Agreements Online
Onboard a landlord in an hour by signing the property management agreement electronically — preparation to audit trail.
4 minReadSigning School Permission Slips Online: What's Valid
Are electronic signatures valid for school permission slips? Yes — and here's what schools need to capture for defensibility.
4 minReadSmallpdf daily limits explained (and how to work around them)
Smallpdf's free tier limits two tasks a day. Here is what counts as a task, and what to do when you hit the cap.
4 minReadSmallpdf vs Flint: which is faster?
On the same file, which browser PDF tool is faster? Here is the honest speed comparison.
4 minReadSmallpdf vs iLovePDF: a fair comparison
The two best-known browser PDF tools, head to head — plus a note on where Flint enters the picture.
5 minReadSOC 2 and your PDF tools
SOC 2 reports tell you what controls a vendor has. PDF tool choice is part of your own SOC 2 picture.
4 minReadSpeedrun: Compressing a Portfolio PDF
Speedrun: portfolio PDF from 80 MB to under 10 MB in 30 seconds. Browser-based, quality preserved.
3 minReadSpeedrun: Converting a Bank Statement to Excel
Speedrun guide to converting a bank statement PDF to a usable Excel file. Under 90 seconds.
3 minReadSpeedrun: Deleting Blank Scanner Pages
Speedrun: scanner included blank pages, delete them all in 30 seconds. Browser-based, visual selection.
2 minReadSpeedrun: Merging a 50-Page Deck
Speedrun guide to assembling a 50-page deck from multiple source PDFs. Under a minute end-to-end.
3 minReadSpeedrun: Organising Monthly Receipts
Speedrun: scattered receipts to merged monthly pack in 5 minutes. The minimum-viable monthly ritual.
3 minReadSpeedrun: Prepping a Tax Pack
Speedrun the annual tax pack from twelve monthly packs to one clean annual document in 15 minutes.
4 minReadSpeedrun: Redacting a Confidential PDF
Speedrun guide to redacting a confidential PDF in under a minute. Proper redaction, not just black boxes.
3 minReadSpeedrun: Rotating Scanner Output
Speedrun: scanner output with 20 sideways pages, all rotated correctly in 30 seconds. Browser-based batch rotation.
2 minReadSpeedrun: Sending a Pitch Deck
Speedrun: pitch deck from export to inbox in under two minutes. Compressed, named, sent — all the trimmings.
3 minReadSpeedrun: Signing and Returning a Contract
Speedrun: contract lands in inbox, signed and returned in 90 seconds. Browser-based, no printer involved.
3 minReadSplit a massive PDF into emailable pieces
When the attachment limit defeats you, split first. Get parts that each slip through email size caps.
4 minReadSplit PDF after cover page
Pull the cover or title page off the front of a PDF so you can route it separately — or replace it entirely.
3 minReadSplit PDF by bookmarks
Bookmark-aware splitting — turn each chapter, section, or named region into its own PDF without manually setting ranges.
4 minReadSplit PDF by content
When pages don't have bookmarks but do have predictable text markers, split a PDF wherever those markers appear.
4 minReadSplit PDF by file size
Email and portal size limits don't have to ruin your day — split a too-big PDF into parts that each fit under the cap.
4 minReadSplit PDF by odd and even pages
Odd pages in one file, even pages in another — useful for fixing duplex-scanner mishaps and printer-driver workflows.
3 minReadSplit PDF by page orientation
Mixed-orientation PDFs split into a portrait file and a landscape file, in case you want them separate for printing or distribution.
3 minReadSplit PDF by page range
Pull out exactly the page ranges you need from a long PDF, with range syntax that supports multiple non-contiguous sections.
3 minReadSplit PDF every N pages
Fixed-interval PDF splitting. Set a chunk size, get a ZIP of evenly-sized PDFs in seconds.
3 minReadSplit PDF into chapters
Turn a 400-page book or report into 12 chapter-sized PDFs, easier to share, easier to read, easier to update later.
4 minReadSplit PDF into single pages
One PDF in, N single-page PDFs out — clean, sequential, ready for whatever per-page workflow needs them.
3 minReadSplit PDF keeping bookmarks
Bookmark-preserving splits — each output PDF retains the bookmark subtree relevant to its pages, not a flat list.
3 minReadSplit scanned PDF into pages
Per-page output from a scanned PDF, ready for OCR, archival, or routing to different people.
3 minReadSplit textbook PDF by chapter
Studying smarter: split a 600-page textbook PDF into chapter files so each week's reading is a single focused download.
4 minReadSwap two pages in a PDF
When exactly two pages are swapped, a dedicated swap operation is faster than dragging — Flint has it.
3 minReadTen PDF Habits That Save Real Time
Small habits compound. Ten specific PDF habits that take seconds each and save hours of friction across a working year.
4 minReadTen PDF tasks you should not do manually
Ten common PDF tasks that have a one-click solution you might not know about.
4 minReadThe Anatomy of a Good, Shareable PDF
A good shareable PDF looks the same to everyone, opens fast, behaves predictably. Here is the eight-point checklist that gets you there.
4 minReadThe anatomy of a merged PDF
How merging actually works and what to expect from the result.
3 minReadThe anatomy of a PDF
A gentle peek inside the file, layer by layer.
3 minReadThe anatomy of a redacted PDF
Why a properly redacted PDF is structurally different from a covered one.
3 minReadThe anatomy of a signed PDF
What makes a signed PDF different from any other PDF.
3 minReadThe most famous PDF redaction failures
When you see how it's gone wrong, you understand why proper redaction matters.
5 minReadThe only PDF tools you actually need
A pared-down list of the PDF tools that actually earn their place.
3 minReadTimestamping electronic signatures, explained
When 'when' matters, a trusted timestamp is what proves it. A short primer.
4 minReadTracked PDF views, explained
View tracking turns a PDF into a one-way audit log. Useful, with limits.
3 minReadTrue redaction vs visual redaction
If you can copy the redacted text out, it wasn't redacted. The two-second test.
3 minReadUETA, explained
The Uniform Electronic Transactions Act in plain English, with the New York exception called out.
4 minReadThe Ultimate PDF Workflow for Knowledge Workers
A repeatable PDF workflow built for the way knowledge workers actually work — inbox to archive in minutes, not hours.
5 minReadWet signature vs electronic signature
Wet ink is not extinct, but it is rarely required. Here is when each is right.
4 minReadWhat does PDF stand for?
The three letters demystified — plus a short history of why the name actually fits the file.
3 minReadWhat is a fillable PDF?
Forms you can type straight into — no printing, no scanning. Here's how they work.
3 minReadWhat is a flattened PDF?
Flattening locks a PDF down so no one can edit the fields, signatures or annotations later.
3 minReadWhat is a PDF?
A friendly explainer of what a PDF actually is and why so many of your files show up in this format.
3 minReadWhat is a PDF good for?
The jobs PDFs were genuinely made for — and why reaching for one is usually the right call.
3 minReadWhat is a PDF not good for?
The honest list of jobs PDFs aren't great at — and what to reach for instead.
3 minReadWhat is a scanned PDF?
Pictures of paper, wrapped in a PDF. Here's how to tell, and what to do with one.
3 minReadWhat is a signed PDF?
Putting a name to a contract — how digital signatures work on a PDF.
3 minReadWhat is an encrypted PDF?
A PDF locked behind a password — how it works and when it's the right call.
3 minReadWhat is PDF/A?
The archive-friendly cousin of the regular PDF, explained in plain English.
3 minReadWhat is PDF compression?
How PDFs go on a diet without losing what matters — and when to put yours on one.
3 minRead