38 free tools · no sign-up · no email required
Free UK business tools that actually answer the question.
WhatsApp Business API cost, no-show revenue loss, Stripe UK fees, CRM switching cost, customer lifetime value, CAC, churn, aesthetics licensing readiness, WhatsApp green tick eligibility, UK GDPR privacy policy, and 28 more. Every tool runs in your browser. No sign-up. No email captured. Free forever.
- Built by Nuvenar Ltd (UK)
- Meta Verified Tech Provider
- Every PDF tool runs in-browser
- No email capture
Most used this month
Six tools most operators reach for first.
WhatsApp Business API Pricing Calculator
WhatsApp Business API pricing calculator. UK rates, July 2025 model.
Bookings
Salon & Clinic No-Show Loss Calculator
Real annual revenue lost to no-shows. With the fix.
Payments
Stripe UK Fee Calculator
Stripe UK fee calculator. Per-transaction, monthly, annual.
Operations
SaaS Stack Cost Audit
SaaS stack cost audit. See what NuvenarHub replaces and what you keep.
Aesthetics
UK Aesthetics Licensing Readiness Checker
Is your clinic ready for the new licensing scheme?
Compliance
UK GDPR Privacy Policy Generator
UK GDPR privacy policy generator. ICO-aligned. Free.
Save calculations, export white-label PDFs, share with clients.
The calculators stay free forever. Pro adds persistence, branding, and sharing across all 38 tools.
Browse by category
All 38 tools, sorted by what you need.
WhatsApp · 5 tools
WhatsApp Business API tools
Model your WhatsApp Business API costs before you commit to a plan, check whether your business qualifies for the green tick, and see if your message templates will pass Meta's approval queue on the first submission.
WhatsApp Business API Pricing Calculator
WhatsApp Business API pricing calculator. UK rates, July 2025 model.
Open →WhatsApp Template Approval Checker
Paste a template. See why Meta is rejecting it.
Open →WhatsApp Green Tick Eligibility Checker
Will Meta verify you? Find out in 90 seconds.
Open →Twilio SMS vs WhatsApp Cost Calculator (UK)
Twilio SMS vs WhatsApp cost calculator. Side-by-side UK rates.
Open →No-Show Recovery WhatsApp Sequence Generator
No-show recovery WhatsApp sequence generator. T-48h, T-24h, T-2h, post.
Open →
Messaging templates · 3 tools
Message and email generators
GDPR-aligned WhatsApp opt-in language, welcome messages that convert, cold outreach email sequences, and win-back templates for lapsed customers. Copy, paste, tweak, send.
WhatsApp Welcome Message Generator
WhatsApp welcome message generator. By UK industry, copy and paste.
Open →Cold Outreach Email Sequence Generator (UK)
Cold outreach email sequence generator. UK PECR compliant.
Open →Customer Win-Back Email Generator
Customer win-back email generator. Three variants by churn reason.
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Sales and CRM · 5 tools
Sales, CRM and growth calculators
Customer lifetime value, CAC, churn rate, lead response time ROI, CRM switching cost. The numbers you need before a founder decision meeting, not after.
Customer Lifetime Value Calculator
Customer LTV calculator for UK service businesses. Honest maths.
Open →CRM Switching Cost Calculator
CRM switching cost calculator. UK pricing for HubSpot, Pipedrive, Salesforce, Zoho, Monday, plus NuvenarHub.
Open →Lead Response Time ROI Calculator
Lead response time ROI calculator. See what slow replies cost you.
Open →Customer Acquisition Cost (CAC) Calculator
CAC calculator for UK SMB. Blended and per-channel, with payback.
Open →Churn Rate Calculator
Churn rate calculator. Monthly, annual, and healthy-band indicator.
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Bookings · 2 tools
Bookings and no-show calculators
How much are Treatwell, Fresha and Booksy fees actually costing you? What's your annual revenue loss to no-shows? Model it in under a minute.
Aesthetics · 2 tools
UK aesthetics clinic tools
Aesthetics licensing readiness checker (JCCP + DHSC scheme aware) and aesthetics-specific ROAS calculator. Built with UK aesthetic clinics we already serve.
Payments · 1 tools
Payment fees and reconciliation
Stripe UK fee calculator with the exact per-transaction breakdown including 3D Secure, chargebacks, refunds and international-card surcharges.
PDF · 16 tools
Browser-side PDF tools
Merge, compress, convert to and from Word/Excel/JPG, OCR, e-sign, edit metadata, redact, rotate, split, unlock, watermark, add page numbers. Every operation runs in your browser. Files never touch our servers.
Merge PDF
Combine multiple PDF files into one. Free, private, runs in your browser.
Open →Compress PDF
Shrink PDF file size by downsampling embedded images. Browser-side.
Open →PDF to JPG
Convert PDF pages to JPG images. One file per page.
Open →JPG to PDF
Combine JPG and PNG images into a single PDF. Browser-side.
Open →Split PDF
Extract single pages or page ranges from a PDF. Download as a ZIP.
Open →Rotate PDF
Rotate PDF pages 90, 180, or 270 degrees. Per page or all.
Open →Add page numbers to PDF
Add page numbers to any PDF. Choose position, format, and start page.
Open →Watermark PDF
Add a text watermark to every page of a PDF. Customisable.
Open →eSign PDF
Sign a PDF in your browser. Draw, place, download.
Open →Redact PDF
Permanently black out text in a PDF. True redaction, not just a cover.
Open →OCR PDF
Turn a scanned, image-only PDF into searchable text. In your browser.
Open →Edit PDF metadata
Edit PDF title, author, subject, keywords. Strip metadata for privacy.
Open →Unlock PDF
Remove a password from a PDF you own. Browser-side.
Open →PDF to Word
Convert PDF to editable Microsoft Word .docx. Server-side, high fidelity.
Open →Word to PDF
Convert .docx Microsoft Word documents to PDF. Free.
Open →PDF to Excel
Convert PDF tables into Excel .xlsx. Server-side.
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Compliance · 3 tools
UK compliance and legal tools
UK GDPR privacy policy generator (PECR-aligned), aesthetics licensing readiness, email deliverability check. Free, no email capture, ready to copy into your own site.
WhatsApp Opt-In Generator (UK GDPR)
ICO-aligned WhatsApp opt-in copy + embeddable form.
Open →UK GDPR Privacy Policy Generator
UK GDPR privacy policy generator. ICO-aligned. Free.
Open →UK Email Deliverability Checker (SPF / DKIM / DMARC)
Email deliverability checker. Live DNS lookup for SPF, DKIM, DMARC.
Open →
Operations · 1 tools
Operations and stack audit tools
SaaS stack cost audit to catalogue what you're paying across your subscriptions. Founder-facing numbers, not IT-facing screenshots.
Why free
No trick, no email wall.
Nuvenar Ltd builds NuvenarHub, a UK operating system for growing businesses. Most of the calculators here started as internal spreadsheets we sent to prospective customers who asked things like "how much will WhatsApp Business API cost me on the volume I send?" or "is CRM switching actually worth it?".
Publishing the calculators publicly is cheaper than answering the same question forty times a month. We ask for nothing in exchange. If the calculator convinces you that NuvenarHub is worth trialling, brilliant. If it convinces you that your current setup is fine, also brilliant. Either way, better decisions get made with real numbers than with vendor claims.
. Tools FAQ
Common questions.
If the answer is not here, send the question to support@nuvenar.com. Replies inside one working day.
- Yes, actually free. No sign-up required. No email captured. No usage limits. No hidden "pro" upsell on the calculator itself. Nuvenar Ltd (UK company registered in England and Wales, Company No. 17240693) publishes these tools because a lot of what our own customers ask us to model is the same calculation over and over: WhatsApp Business API cost, no-show loss, Stripe fees, CRM switching cost. Publishing the calculators publicly is cheaper than answering the same question 40 times a month.
- The WhatsApp Business API Pricing Calculator at nuvenar.com/tools/whatsapp-pricing-calculator. It uses Meta's current UK per-message rates by category (utility, marketing, service, authentication), calculates your monthly cost from your typical send volume, and shows the pass-through cost on any provider that doesn't mark it up. Includes the Meta free-tier allocations most calculators miss.
- Use the Salon & Clinic No-Show Loss Calculator at nuvenar.com/tools/no-show-loss-calculator. Enter weekly booking volume, average ticket, current no-show rate, and rebook-attempt rate. The tool models annual revenue loss, and shows the recovery you'd see if you halved the DNA rate (which typical two-message WhatsApp confirmation flows achieve inside six weeks). For an aesthetic clinic on 100 bookings a week at £120 average ticket with 15% no-shows, that recovers around £36,000 a year.
- Yes. Every calculator, generator, and PDF tool works without an account, without an email address, and without a captcha. Nuvenar's Tools Pro subscription (£9/mo) adds save-and-share, white-label PDF export, and calculation history across all 38 tools, but the calculators themselves stay free forever. That is a hard commitment, not a marketing tease.
- The WhatsApp Green Tick Eligibility Checker at nuvenar.com/tools/whatsapp-green-tick-checker. It runs your business through Meta's known criteria (brand recognition, industry sensitivity, notability, verified presence, active WhatsApp Business Account, message quality tier) and gives you a probability score plus the specific items Meta will look for.
- No. Every PDF tool on nuvenar.com/tools runs entirely in your browser using client-side JavaScript. Merge, compress, split, rotate, watermark, e-sign, OCR, convert. Files never leave your device. No file upload, no server-side processing, no retention. Safe for confidential documents, contracts, and patient records.
- Yes. The UK Aesthetics Licensing Readiness Checker at nuvenar.com/tools/aesthetics-licensing-checker walks through the JCCP and DHSC aesthetics licensing scheme criteria (practitioner qualification level, premises registration, insurance, complaints procedure, consent workflow, adverse-event reporting) and gives you a readiness score with the gaps to close before scheme sign-up opens.
- The CRM Switching Cost Calculator at nuvenar.com/tools/crm-switching-cost-calculator. It models data migration cost (typically £3-15K), team retraining time (measured in team-hours, not calendar days), integration rebuild (usually the hidden killer), contract-exit cost on your existing tool, and payback period on the switch. Gives you a defensible number for the founder decision meeting.