This content originally appeared on DEV Community and was authored by Landolio
Over the last month I built 25 free browser-based tools for UK freelancers. No sign-up, no paywall, no email capture wall. Just open and use.
Here are the ones that actually get traffic — and the ones that don't.
The hits
🏆 Day Rate Calculator
Far and away the most popular. You put in your target salary, expenses, and tax situation — it tells you what daily rate to charge.
Turns out "what should I charge?" is the question every freelancer asks first.
→ Try it
🏆 Self-Employed Tax Calculator
Second most popular. People want to know how much tax they'll actually pay. The breakdown showing Income Tax + NI + student loan side by side seems to be what people find useful.
→ Try it
🏆 Late Payment Interest Calculator
This one surprised me. Turns out a LOT of freelancers are owed money and want to know how much statutory interest they can claim. (Spoiler: it's 8% + Bank of England base rate. Currently 12.5% total.)
→ Try it
The solid performers
- Invoice Generator — create + download PDF invoices. Steady traffic.
- VAT Threshold Calculator — checks rolling 12-month turnover. Useful but niche.
- MTD Readiness Checker — 8-question quiz on Making Tax Digital readiness. Very timely (MTD starts April 2026).
- Freelancer Client Tracker — full CRM in your browser with localStorage. No sign-up.
The ones nobody uses
Honestly? The tools with longer names and more specific use cases get almost zero traffic:
- Statement of Account Generator
- Payment Terms Generator
- Mileage Allowance Calculator
Lesson: simple, broad tools beat specific, clever ones. "How much tax do I pay?" beats "Generate a payment terms clause" every time.
What I learned building them
localStorage is underrated. The expense tracker and client tracker use it for persistence. Zero backend, zero auth, works offline. Users love not signing up.
UK-specific beats generic. Generic "invoice template" tools are everywhere. "UK invoice template with VAT toggle and HMRC-compliant fields" — that's a gap.
Calculators > generators. People trust tools that show them numbers more than tools that generate text. Probably because calculator output feels objective.
Mobile matters more than you think. Over 60% of traffic is mobile. Every tool had to work on a 375px screen.
The full list
All 25 are at landolio.com/tools. Everything's vanilla HTML/CSS/JS, no framework, no build step. Hosted on Cloudflare Pages (free tier).
If you're a UK freelancer, have a play. If something's broken or you want a tool I haven't built yet, let me know.
What tools do you wish existed for freelancers? I'm always looking for the next one to build.
This content originally appeared on DEV Community and was authored by Landolio
Landolio | Sciencx (2026-03-14T19:12:55+00:00) I built 25 free tools for UK freelancers. Here are the ones people actually use.. Retrieved from https://www.scien.cx/2026/03/14/i-built-25-free-tools-for-uk-freelancers-here-are-the-ones-people-actually-use/
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