🔐 Security & Generators
Generators built on your browser's cryptographic random source rather than Math.random, with the entropy stated so you can judge the strength yourself.
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About security & generators
Anything generating a secret must do it locally, and must do it properly. Both halves matter. A password generated on a server has been transmitted before you ever see it. A password generated from a weak random source is predictable no matter how long it is.
The tools here use crypto.getRandomValues, which draws on entropy collected by your operating system, and they use rejection sampling to avoid the modulo bias that skews most quick implementations. Nothing makes a network request — you can disconnect and generate offline to verify it.
Where a number is shown — bits of entropy, an estimated crack time — the assumptions behind it are stated, because a coloured strength bar with no explanation tells you nothing useful.
Most used in this category
Generate strong random passwords or passphrases.
Generate SHA-256, SHA-384 and SHA-512 hashes of text or files.
Generate random numbers in a range, with or without repeats.
Other categories
Merge, split, compress, rotate and convert PDF documents.
Convert, compress, resize, crop and rotate images.
Format, validate, encode and test — JSON, Base64, regex and more.
Loans, percentages, dates, ages and everyday arithmetic.
Count, convert, sort, deduplicate and compare text.
Length, weight, temperature, speed, storage, time zones and number bases.