Free tools
Small tools for the unglamorous bits of shipping.
Every one of these runs entirely in your browser. Nothing is uploaded, nothing is stored, and there is no account to create — we built them because we kept needing them ourselves.
Design
Logo Color Changer
Recolour an SVG logo to black, white or any hex value and download it in seconds.
WCAG Contrast Checker
Check whether a text colour and background pass WCAG 2.1 AA and AAA contrast thresholds, at both normal and large text sizes.
APCA Contrast Calculator
Calculate the APCA lightness contrast (Lc) between two colours — the perceptual model behind the emerging WCAG 3 accessibility guidelines..
Color Palette Generator
Generate a coherent colour palette from a single base colour, browse harmony rules, and copy the hex values straight into your design or CSS..
Color Transparency Generator
Take any colour and see it at every opacity step, then copy the RGBA value you need.
Content & Writing
Meta Description Generator
Generate meta description variations for any page, each with a live character count, so you can pick one that says something useful before Google truncates it..
Alt Text Generator
Turn a short description of your image into properly structured alt text — descriptive, concise, and free of the phrases screen readers flag..
Readability Test
Paste your copy to get Flesch reading ease and Flesch-Kincaid grade level, plus concrete suggestions on which sentences to cut down..
Hero Section Generator
Describe your product and get three hero-section variations — headline, subheading and call-to-action — each previewed the way it would sit on the page..
Data Analysis
Conversion Rate Calculator
Turn visitors and conversions into a conversion rate percentage, instantly.
Conversion Rate Comparison Calculator
Compare two conversion rates side by side and see the relative lift between them — the quick sanity check before you call an A/B test..
NPS Calculator
Enter your promoter, passive and detractor counts to get your Net Promoter Score, with the percentage breakdown behind the number..
Percentage Increase Calculator
Calculate the percentage change between two numbers, in either direction.
Times Increase Calculator
Convert a change between two numbers into a multiplier — the "3x growth" framing investors and board decks actually use..
Utility
QR Code Generator
Turn any link or text into a QR code and download it as a crisp PNG or scalable SVG.
UTM Link Builder
Build tagged campaign URLs that your analytics tool will actually group correctly.
Email Signature Generator
Build a clean HTML email signature with your name, role, company and links, then copy it straight into Gmail or Outlook.
Timezone Converter
Convert a date and time between two time zones, with the offset difference spelled out, so you can schedule across a distributed team without doing the maths in your head..
Ready to see where agents can take cost out of your business?
Tell us about the process you want to optimise. Vlad personally reviews every brief and replies within one business day.