233 step-by-step guides that end in a tool you can open. Written against the tool's real behaviour and checked against primary sources.
Featured · Security
A Content-Security-Policy that blocks on day one breaks the site; one that allows 'unsafe-inline' protects very little. Here is the path in between: report first, tighten, then enforce.
8 min read Updated Uses CSP Header Generator
Short series that take you from the first step to a finished result.
8 guides · 67 min
Headers, certificates and the checks that catch mistakes.
5 guides · 35 min
Move settings between YAML, TOML, INI and .env.
5 guides · 38 min
Read and convert the formats your tools expect.
Security · 8 min
A password hash has to be slow and salted. Here is what bcrypt and Argon2id do that SHA-256 does not, how to read the encoded string, which settings to start from, and how to check a stored hash from PHP, Node or Python.
Password Hasher (bcrypt / Argon2id)
Convert · 6 min
A subtitle file already holds every word of a video, wrapped in cue numbers, timing lines and tags. Here is how to strip that away, which join style to pick, and what a transcript made this way cannot tell you.
SRT to TXT
Convert · 7 min
Literal <i> and {\an8} in your captions, or [DOOR SLAMS] in a track meant for a hearing audience? Here is where that junk comes from, what each cleaning option removes, and why empty cues are dropped.
Subtitle Cleaner
Convert · 7 min
Two subtitle lines on screen at once, or one that flashes and vanishes, usually means a cue starts before the previous one ends. Here is how to spot the overlap, what the fix changes, and how to check the result.
Subtitle Overlap Fixer
Convert · 7 min
A newsletter export lists the same subscriber three times: once as signed up, once in capitals from a form, once from a second import. Removing duplicate rows by the email column, with case and stray spaces ignored, leaves one row per person and a separate file showing exactly what went.
CSV Dedupe
Convert · 7 min
Two exports of the same table, a week apart, and the question is what changed. A line diff drowns in reordered rows. Matching the rows by a key column and comparing them cell by cell answers it directly: these rows are new, these are gone, and these three prices moved.
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