Mirror a Number

A number holds a hidden symmetry: read it left to right or right to left, and the digits can answer back in perfect reverse. "Mirroring" spins that symmetry into shapes - append the reverse to double the number into a palindrome, build a full mirror with the original at its center, or simply flip the digits alone to see the reflection by itself.

Mirror a Number reflects any value you type. Choose a plain reverse, a double mirror that appends the reversed half, a full mirror that keeps the original in the middle, or a leftward mirror that leads with the reverse. Signs stay put and decimals stay tidy, and the tool reports whether the number is already a palindrome. Copy or download the mirrored form in one click.

• Four mirror styles: Reverse, double (append), full (center), and left (prepend).
• Instant palindrome check: The tool flags numbers that already read the same both ways.
• Sign-safe: A leading minus or plus never gets dragged into the reversed half.
• Decimal aware: Decimals mirror cleanly with their fraction preserved.
• Text-exact: Any length reverses perfectly, with no rounding at big magnitudes.
• Live preview: Results update as you type and switch styles.
• Copy or download: Export the mirrored number for puzzles, code or art.
• Free and private: Everything runs locally; nothing is uploaded or stored.

1. Enter a number - with or without a sign, and optionally a decimal part.
2. Pick a mirror style - reverse, double, full, or left.
3. Read the reflection - the mirrored result appears instantly.
4. Check the flag - the tool tells you if the input was already a palindrome.
5. Copy or download the mirrored number for your puzzle or pattern.

Example 1 - Reverse. Enter 123: 321 - the digits read right to left.

Example 2 - Double mirror. Enter 123: 123321 - the reverse is appended, forming a palindrome.

Example 3 - Full mirror. Enter 123: 12321 - the original stays in the middle and reflects outward.

Example 4 - Left mirror. Enter 123: 321123 - the reversed half leads.

Example 5 - Sign and decimal. Enter -4.2 with double mirror: -4.24.2 - the sign leads and the decimal half mirrors its own digits.

• Palindromes on demand: Build mirror-symmetric numbers for puzzles, IDs and art.
• Four reflections: Reverse, double, full and left styles cover every way a mirror can sit.
• Exact at any size: Text-based reversal keeps every digit, even beyond float precision.
• Signs and decimals respected: Real numbers mirror without their sign landing mid-digit.
• Instant insight: The palindrome flag shows the symmetry of your input at a glance.
• Private and free: All mirroring stays in the browser; nothing is uploaded or logged.