All Tools VerseJSON: Validate, Format and Convert It Anywhere
JSON is stricter than the JavaScript it resembles: the four classic errors, the silent big-ID corruption past 2^53, and the conversion toolbox.
Blog
Anagrams and Palindromes: Word Play with Tools
Listen becomes silent via a sorting trick, 89 needs 24 steps to mirror, and 196 has defeated billions of computations: wordplay with mechanics.
UPPERCASE, lowercase, Title Case: Case Conversion
Case conversion has rulebooks and two real traps: it destroys information one way, and it is language-dependent in ways ASCII rules corrupt.
Word and Character Counts: Limits That Matter
A character is not one thing: the limits that matter, the emoji that counts four ways, the SMS trap that halves your message, and the workflow.
Remove Duplicates from Any List in Seconds
Dedupe is one click and three decisions: matching options, survivor choice, and the sleeper mode that shows only the duplicates.
Sort a List Alphabetically (Natural Sort Explained)
Sorting has conventions, not just an algorithm: natural sort, the lowercase sink, accent handling, and the options that decide what you get.
Clean Up Messy Text: 20 Free List and Text Tools
Messy lists clean up in four passes if you run them in the right order: the pipeline, the invisible enemies, and every tool mapped by job.
Countdown and Elapsed Time: Timers That Work
Counting toward and away from a moment, the three choices that define a finish line, round-number milestones, and the live timer’s hidden assumptions.
Time Zones: Convert Meeting Times Without Mistakes
Three traps hide in timezone math: staggered DST switches, the two ambiguous twelves, and the date line. All three, made mechanical.
Business Days vs Calendar Days (and Leap Years)
The two counts side by side, day-zero and rollover conventions, why holidays defeat automation, and the weeks trick that makes estimation easy.
Timesheet Math: Add Hours and Minutes Correctly
Hours and minutes are base-60 pretending to be decimal: the carry rule, the 7.45 trap, a worked week of shifts, and where payroll cents leak.
Unix Epoch Time: Why Computers Count from 1970
Every log and API speaks a number near 1.78 billion: why 1970, how to read epochs at a glance, and the two traps that bend dates by millennia.