About RandomLetterGenerator

RandomLetterGenerator.net does one small thing with unusual care: it draws random letters, and it can prove they are fair. Most letter pickers online are a one-liner around Math.random() — a source never meant to be unbiased or unpredictable — wrapped in claims no one can check. Here, every draw comes from the browser’s cryptographic random source and is mapped onto the letter pool by rejection sampling, a construction under which every letter is exactly equally likely. The site is published by Sumvia, the team behind the Sumvia.net calculator network.

The tools

The flagship generator on the landing page carries every option: 1–100 letters, English or Greek alphabet, upper/lower/mixed case, vowel and consonant filters, custom include/exclude pools, and draws with or without repeats. Around it sit five focused pages that answer their question with no setup: the Vowel Generator (A E I O U), the Consonant Generator (the other 21 letters), the Random Letter Sequence tool (whole strings, with or without repeats), Uppercase & Lowercase Letters (including the 52-letter mixed pool where A and a are distinct), and the Greek Letter Generator (all 24 letters, alpha to omega, names included).

Who it serves

Teachers running phonics, spelling, and letter-recognition rounds who need a picker no student can argue with. Families and friends playing letter-based party games — "name something starting with…" — who want the letter chosen by no one. Students memorizing the Greek alphabet out of order. Developers and testers who need letter strings that carry no accidental meaning. The common thread is fairness you don’t have to take on faith.

What "uniform" means here — and what we refuse to claim

Uniform means every letter in the active pool has exactly the same probability: 1/26 across the English alphabet, 1/5 among vowels, 1/52 in the mixed-case pool. The site never weights draws by English letter frequency, and no page will ever imply that it does — a generator that quietly made E more common than Z would be a loaded die, not a better tool. The flip side of honest uniformity is honest streakiness: repeats and runs are normal, and the copy says so instead of promising "nicely spread out" results.

Tested drawing logic

The whole engine — rejection sampling, pool composition, uniqueness, the Greek alphabet data — is a small set of pure, typed functions with an automated test suite, including tests that drive the sampler with scripted byte sources to pin the exact byte-to-letter mapping. Worked examples in page copy are drawn at build time by that same engine, so documentation cannot drift from behavior. The methodology page explains the construction in plain language.

Browser-native, no accounts

Letters are drawn on your device and shown to you — nothing you generate is transmitted, logged, or stored, there is no registration, and a loaded page keeps working on a flaky connection. This is a deliberate design constraint of every Sumvia site.

Honest limits

These are letter tools, not security tools. Letter sequences make weak passwords and the sequence page says so plainly, pointing to a proper password generator instead. The Greek tool covers the modern 24-letter alphabet, not archaic letters or accented forms. And no generator here can make randomness feel fair on a small sample — five draws can all be the same letter, exactly as fairness requires.

Get in touch

Found a problem, or want another letter tool? See the contact page — reports of suspected engine issues are especially welcome and are treated seriously: confirmed issues get fixed and locked in with a new test.