Articles by Daniel Foster
Tools & Privacy Writer
Productivity
JWT Decoder: How to Read and Debug a JSON Web Token
Decoding a JWT shows you exactly what it contains — but decoding is not the same as verifying it is genuine, and that distinction matters a lot.
Productivity
Free Hash Generator: What MD5, SHA-1 and SHA-256 Actually Do
A hash is a one-way fingerprint of data — the same input always produces the same hash, but the hash can never be reversed back into the original input.
Converters & QR
Binary, Hex and Decimal Numbers Explained (And How to Convert Between Them)
Binary, decimal and hexadecimal are all just different bases for counting the same quantities — hex exists mainly to make binary easier for humans to read.
Converters & QR
Base64 Encoding Explained: How to Encode and Decode Text or Data
Base64 is not encryption and does not compress anything — it exists purely to make binary data safe to carry in text-only formats.
Productivity
The Developer's Guide to Formatting and Validating JSON
Turn a wall of minified JSON into something you can actually read and debug.
PDF Tools
How to Keep Your PDF Documents Private and Secure
The biggest PDF privacy risk is not hackers — it is where you process your files.
Converters & QR
Image to Base64: What It Is and When You Should Use It
When embedding an image as text speeds things up — and when it backfires.
Image Editing
How to Remove EXIF Metadata From Your Photos for Privacy
The hidden data in your photos can reveal where you live — here is how to strip it.
Productivity
How to Generate Strong Passwords and Actually Keep Them Safe
What actually makes a password strong — and how to manage them without losing your mind.
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