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How to preserve what matters, spot what an AI made and get more out of your documents. No filler.
Authenticity & AI
Do AI detectors work? How to tell if text was written by AI
AI detectors can give a useful hint on long, unedited text, but they err in both directions and cannot prove authorship. Here is how to read them.
7 min · October 13, 2026
Digital evidence
How to capture a web page as evidence before it changes
Save the full-page image, the HTML, the response headers, the exact URL and the time, then lock each file with a hash and a trusted timestamp.
7 min · October 13, 2026
Digital evidence
How to preserve WhatsApp messages as evidence
Export the full chat from the app, keep the phone with nothing deleted, and lock the exported file with a hash and a trusted timestamp. Step by step.
7 min · October 13, 2026
Digital evidence
How to remove metadata from photos before you share them
A photo can carry the date, your phone model, and GPS coordinates. How to view that EXIF data and remove it on Windows, Mac, iPhone, and Android.
7 min · October 13, 2026
Authenticity & AI
How to tell if an image is AI-generated or a real photo
No single test can tell you if an image is AI-generated. Learn how to combine visual clues, reverse image search, metadata and Content Credentials.
8 min · October 13, 2026
Digital evidence
What is a trusted timestamp, and how does it prove a file existed on a certain date?
A trusted timestamp is a third party's signed statement that your file's fingerprint existed at a given time. What it proves, what it doesn't, how to use it.
8 min · October 13, 2026
Education
How to grade tests faster with an answer key and a rubric
A written answer key and rubric let you grade tests faster and apply the same standard to every student. How to build one and use AI responsibly.
7 min · October 13, 2026
Digital evidence
How to prove when and where a photo was taken
EXIF dates and GPS tags can be edited. Keep the original file and lock it with a hash and a trusted timestamp soon after you take the photo.
8 min · October 13, 2026
Documents
How to convert a PDF table or invoice to Excel
Copying a table from a PDF into Excel scrambles it. Your options for text PDFs, scans, and photos, and what to check so errors don't slip through.
8 min · October 13, 2026
Authenticity & AI
How to tell if a voice recording is AI-generated
There is no reliable way to spot a cloned voice by ear. What works: hang up, call back on a number you already know and confirm through another channel.
8 min · October 13, 2026
Audio
How to transcribe audio to text: interviews, voice memos and lectures
Transcribing audio to text depends more on the recording than on the method. How to record, transcribe by hand or automatically, and what to check.
7 min · October 13, 2026
Documents
How to anonymize a document before sharing it
A black box over text does not delete it. Learn how to redact or anonymize a document or PDF properly: what to remove, how to do it and how to check it.
7 min · October 13, 2026
Audio
How to write meeting minutes: format, template and action items
Meeting minutes record decisions and action items with an owner and a due date, not everything that was said. A simple template and what to review.
7 min · October 13, 2026
Digital evidence
How to check if a file has been modified
Compute the file's SHA-256 checksum and compare it with a known value. If they match, the content is identical. Commands for Windows, macOS and Linux.
8 min · October 13, 2026
Documents
How to compare two versions of a document and see what changed
Reading two versions side by side misses small edits. How to compare two Word or PDF documents, which contract clauses to check first, and what to avoid.
7 min · October 13, 2026
Documents
How to translate a whole document and check the result
Machine translation is good for understanding a whole PDF or contract. Where it fails, how to check it without speaking the language, and its limits.
7 min · October 13, 2026
Authenticity & AI
What are Content Credentials (C2PA) and how do you check them?
Content Credentials (C2PA) are a signed record of where a file came from. Learn how to check them and why a file without them tells you nothing at all.
7 min · October 13, 2026
Documents
How to summarize a long document without losing what matters
To summarize a long PDF or contract, start with the decision you need to make. Learn a manual method and how to check an AI summary against the source.
7 min · October 13, 2026