RNGdle tools that stay in the browser

Pick the question, not a pile of tools

• Sandbox: what badges and published EP does this exact number touch?
• Calculator: same check, framed as a score for one number you already have.
• Badge finder: for rules we can count, how many integers from 0 to 1,000,000 qualify?

Other sites ship more buttons (compare, near-miss, daily challenge, grid maps). I am not copying that list. Three tools cover the demand, and each page says how the number was produced. Read how EP is described before you treat a sum as the official total.

Method, short version: an integer n with 0 ≤ n ≤ 1,000,000. No leading zeros are added. “Exactly 1984” means the decimal text is 1984, not 001984. Counts use the full 1,000,001 values when the rule is coded.

What I checked myself

I built the three tools against the same 233-row table I saved from badge pages on 1 October 2026. When I type 420420, Hotbox has to match, because its condition text is exactly that string. When a condition is a sentence I cannot evaluate safely, the tool lists the badge as not auto-checked instead of guessing.