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Featured Online Tools
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JSON Formatter
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Learn & Explore
Guides, explainers and developer resources.
m / 44' / 0' / 0' / 0 / 0 │ │ │ │ │ │ │ │ │ │ │ └── address ind
BIP39 Derivation Path m/44'/0'/0': What Each Segment Means
That slash-separated string decides which address your wallet shows. Here is what m, the apostrophes, purpose, coin type, account, change, and index each control.
3 min read
$2b$12$N9qo8uLOickgx2ZMRZoMyeIjZAgcfl7p9
bcrypt vs scrypt vs Argon2: How to Choose a Password Hash
Storing passwords means hashing with a slow, salted, memory-hard function. Here is how bcrypt, scrypt, and Argon2 differ and which to reach for in 2026.
2 min read
name=Jane Doe -> name=Jane+Doe
URL Space: %20 or +? The Two Encoding Rules
Spaces turn into %20 almost everywhere, but into + inside form data. Knowing which rule applies stops broken links and missing query values.
3 min read
const exp = 1780000000; // seco const now = Date.now(); // mill // WRONG: compares ms to seconds
Unix Timestamp: 10 Digits or 13? Seconds vs Milliseconds
A Unix timestamp is either 10 digits (seconds) or 13 (milliseconds). Mixing them up shifts dates by a factor of 1000 — here is how to tell and convert.
3 min read