Free marketing, SEO and business tools
Small tools I built because I needed them. Every one runs in your browser — no sign-up, no account, and nothing you type is ever uploaded.
Paid media 7 tools
Work out what a click, a lead and a customer can cost you before you spend the money.
Break-even ROAS & CPA calculator
The most you can pay per sale or lead before you stop making money.
Open tool →●Ad budget calculator
The smallest monthly budget that can actually work in your market.
Open tool →▾Funnel drop-off calculator
Find the step that loses the most people, from click to sale.
Open tool →≈A/B test significance calculator
Check whether your test result is real or just random chance.
Open tool →∞Customer lifetime value calculator
What a customer is worth over time, and what you can spend to win one.
Open tool →⇄CPM, CPC & CTR calculator
Convert between impressions, clicks, spend, CPM, CPC and CTR.
Open tool →☰Keyword match type generator
Turn a plain keyword list into broad, phrase and exact match.
Open tool →SEO & content 7 tools
Check how a page will look in search, what it is really about, and how easily people can read it.
SERP snippet preview
See how your title and description will look in Google — measured in pixels.
Open tool →∑Keyword density checker
See which words and phrases your page actually uses most.
Open tool →/URL slug generator
Turn a headline into a clean, readable URL.
Open tool →☰Readability checker
Check how easy your writing is to read, and what to fix.
Open tool →{}Schema markup generator
Build valid JSON-LD for business, article, FAQ, product and more.
Open tool →◆Meta tag generator
Every meta tag a page needs, with a live search and social preview.
Open tool →⛒robots.txt generator
Build a robots.txt, including controls for AI crawlers.
Open tool →Ad creative 4 tools
Write to the real limits, and show people what the ad will look like before it goes live.
Ad copy character counter
Check ad text against Google, Meta and LinkedIn limits.
Open tool →▣Social media post mockup
Preview a post as it will appear on Instagram, Facebook, LinkedIn or X.
Open tool →▤Social media ad mockup
Preview a paid ad with the Sponsored label and call-to-action button.
Open tool →⊞Ad & social media sizes
Every ad and organic creative size, shareable as a brief.
Open tool →Tracking 1 tool
Tag your links so your reports tell you which ad actually paid.
Text tools 6 tools
The small everyday jobs — counting, converting, tidying up.
Word counter
Count words, characters, sentences and reading time as you type.
Open tool →ＡText case converter
Switch text between sentence, title, upper, lower, camel and snake case.
Open tool →⇆CSV to JSON converter
Convert CSV to JSON and back, handling quotes and commas properly.
Open tool →{}JSON formatter & validator
Format, validate and minify JSON, with clear error positions.
Open tool →⇄Base64 encoder & decoder
Encode and decode Base64, including images as data URIs.
Open tool →⌚Timestamp converter
Convert Unix timestamps to dates and back, in any timezone.
Open tool →Business & money 7 tools
Invoices, pricing, loans and savings. The numbers behind the marketing.
Invoice generator
Build a professional invoice and save it as a PDF.
Open tool →∑EMI / loan calculator
Monthly repayment, total interest and the full cost of a loan.
Open tool →↗SIP calculator
See what a regular monthly investment could grow to.
Open tool →%GST & VAT calculator
Add or remove GST and VAT from any price.
Open tool →↑Profit margin & markup calculator
Work out margin, markup and the price you should charge.
Open tool →⏱Freelance rate calculator
Work out the rate you need to charge to hit your income target.
Open tool →✎Quote generator
Send a professional quote with terms and an acceptance block.
Open tool →Page speed 8 tools
Lighter images and readable colour, which is most of what a speed score measures.
Image compressor & converter
Shrink and convert images to WebP, JPG or PNG. Nothing is uploaded.
Open tool →◑Colour contrast checker
Check text against its background for WCAG AA and AAA.
Open tool →▣QR code generator
Make a QR code for a link, WiFi, phone or contact card.
Open tool →◫Aspect ratio calculator
Resize without distortion, and check common social ratios.
Open tool →⚙.htaccess generator
Force HTTPS, add redirects, caching, compression and security headers.
Open tool →⇆Image converter
Convert images between JPG, PNG and WebP without uploading them.
Open tool →⇲Image resizer
Resize and crop images, with presets for every social platform.
Open tool →◉Colour converter
Convert between HEX, RGB and HSL, with tints and shades.
Open tool →More useful than a calculator
These answer one question each. If you want someone to look at the whole picture — your accounts, your numbers, and what to fix first — that conversation is free.
Book a free consultationCommon questions
Are these tools really free?
Yes. All 40 are free to use, with no sign-up, no watermark and no limit.
Is my data uploaded?
No. The tools run in your browser, and what you type or choose is not sent to a server by the tool.
Which currencies do the calculators support?
Calculators with money fields include a currency selector, so they suit businesses in the USA, UK, UAE, Australia, India and elsewhere.
Who made these tools?
Premkumar Ragav, an independent performance marketing specialist based in Tamil Nadu, India. He built them for his own client work and shares them for free.