Toolfyra Guides
5 min read • Updated 2026-09-27 • Free forever
Reviewed 2026-10-07 · Every fact checked against the live tool
Deep, practical articles from our research — every guide is free, honest and links to tools that run 100% in your browser.
DV Lottery Photo Requirements (2026): The Complete 600×600…
Exact DV lottery photo rules: 600×600 pixels, under 240KB, head 50–69%, white background. Every reje…
✈️EU261 / UK261 Flight Compensation: The Free DIY Claim Guid…
Delayed 3+ hours, cancelled or denied boarding in the EU/UK? How much you're owed (€250–600), how to…
🔒No-Upload Online Tools: The Privacy-First Way to Get Thing…
Server-based tools copy your files to unknown computers. Browser-based (client-side) tools process l…
🧾GST & VAT for Freelancers: The Plain-English Guide (2026)
Freelancer's plain-English guide to GST/VAT: adding vs removing tax, reverse charge, what invoices m…
🧑💻The Everyday Developer Cheat-Sheet: JSON, Base64, JWT, Cro…
The practical dev cheat-sheet: pretty-print JSON, decode Base64 (UTF-8 safe), read JWT claims and ex…
🌙Hijri to Gregorian Converter Guide: Islamic Dates 2026…
Convert Hijri to Gregorian dates, understand the Islamic calendar and key 1447–1448 AH dates for 2…
🎵How to Use a Metronome Properly: The Practice Metho…
Step-by-step metronome practice: tempo terms, six methods, a 20-minute routine, and the mistakes to…
⏱️Free Online Practice Timers: Metronomes, Stopwatches…
Which free timer fits the job: metronome for music practice, stopwatch for classrooms, big countdown…
🎨Paint Coverage Explained: Walls, Floors, Fences & Ma…
How much paint you need per square metre: formula, per-surface tables, brand coverage and a worked r…
📝Compare, Convert & Clean Any Text Free: Diff, Case &…
Text diff checkers, case converters and word counters explained — with workflows, limits and privacy…