All tools · page 245
6,901 free tools across 25 categories. Tools marked with a lightning bolt are ready to use right now.
Enter a number and get its representation in bases 16, 32, 36, and 58 with round-trip checks.
Paste text and get per-character code points plus UTF-8 byte lengths highlighting multibyte chars.
Paste emoji or rare characters and get the surrogate pair breakdown with code unit math.
Convert text to unicode escape sequences or paste escapes like backslash-u sequences back to text.
Enter a file extension or content hint and get the correct MIME type with charset guidance.
Paste a password hash string and get the likely algorithm, parameters, and verification notes.
Paste text and get the CRC32 checksum in hex and decimal for integrity spot checks.
Paste mixed text and get it normalized to LF or CRLF with a count of changed lines.
Paste text and get BOM presence, its encoding guess, and a cleaned copy without it.
List permissions and get bit values, combine masks, and a decode table for flag checks.
Paste nested JSON and get a flattened key-path version plus an unflatten round-trip check.
Paste JSON or JSONL and convert between the two with per-line validation errors.
Paste YAML and get equivalent JSON, or paste JSON to get clean YAML with indentation notes.
Enter a duration string like PT2H30M and get a human breakdown plus code to produce and parse it.
Describe your content types and get a slug normalization rule set with transliteration choices.
Describe multi-key sorting needs and get a comparator function with tie-breakers and null handling.
Pick a use case and get a CSPRNG snippet with alphabet, length, and entropy readout.
Enter alphabet size and ID length and get collision probability at your user count with math shown.
Describe shareable content and get a Web Share API snippet with clipboard and download fallbacks.
Paste event listener usage and get passive and once recommendations for scroll performance.
Describe what to copy and get an async clipboard snippet with legacy fallback and error toast notes.
Describe navigation steps and get pushState and popstate handling with state serialization rules.
Describe your dynamic lists and get event delegation recipes that cut listener counts with code.
Paste your response headers and get missing security headers flagged with recommended values.