Generate the Biggest Number

The biggest number you can build from a set of digits hides a simple rule: the leftmost digit counts the most, so the largest arrangement is just the digits sorted descending - 9411 from 1, 9, 4, 1. With a length constraint the same logic holds: fill each position from the front backward with the biggest digit allowed.

Generate the Biggest Number prints the maximum value under the constraints you choose. Use every digit you provide in descending order, or set a length and a digit pool and let each position take the largest available option. See the result grouped by thousands, copy it or download it. Everything runs in your browser.

• Two modes: Rearrange a full set of digits, or build from a chosen length and pool.
• Proven optimal: Descending order reaches the maximum for any digit set.
• Length mode: Pick length and allowed digits; each position takes the largest.
• Grouped view: Thousands separators make massive outputs scannable.
• Stats: Digit count, group count and length shown live.
• Text-exact: Up to 1000 digits, generated with no rounding.
• Copy or download: Export the biggest number in one click.
• Free and private: Everything runs locally; nothing is uploaded or stored.

1. Pick a mode - rearrange given digits, or use a length and a pool.
2. Enter the digits (arrangement) or the length and allowed digits (constrained).
3. Read the biggest number - with thousands grouping available.
4. Copy or download it for your comparison or record.

Example 1 - Rearrange. Enter 1941: the biggest arrangement is 9411.

Example 2 - All digits. Enter 012345: sorted descending gives 543210.

Example 3 - Constrained length. Length 3, digits 0-9: 987, the three biggest available digits.

Example 4 - Repeated pool. Length 5, digits 77733: 77773, each position choosing the biggest.

Example 5 - Huge. Length 100: a run of ninety-nine 9s plus a 9 - whatever the pool allows, built exactly.

• Optimal guaranteed: Descending order is mathematically the largest arrangement.
• Controlled constraints: Length and pool let you bound the answer precisely.
• Scannable output: Grouping turns a wall of digits into readable blocks.
• Exact at any size: Text-based generation keeps every digit, even at 1000.
• One-click export: Copy or download the biggest number.
• Private and free: All generation stays in the browser; nothing is uploaded or logged.