All Tools VerseWord 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.
Guides
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.
Date Difference: Days Between Dates Done Right
Calendar math is tricky in exactly three places: endpoint counting, leap years, and the month that has no fixed length. All three, settled.
Duotone, Sepia and Filters: Stylize Photos in Browser
What duotone, sepia and overlays actually do to your pixels, when each earns its place, and the four craft rules that keep filters tasteful.
Blur Faces and Plates: Photo Privacy Before Posting
Light blur over text can be reversed; solid blocks cannot: the redaction ranking, the metadata step, and a checklist that takes two minutes.