Meta Title and Description Length Checker
Check that your title and description fit before you publish, rather than discovering the truncation afterwards.
Read moreFree tools
Tools that run in your browser
Small utilities we built because we needed them. Every one runs on your own machine: nothing you paste or open is uploaded, and none of them ask you to sign up.
- Nothing uploaded
- No sign-up
All tools
SEO Tools
Check, measure and fix the things that decide whether a page ranks.
Keyword Density Checker
Useful for spotting what a page is actually about, and for catching accidental repetition.
Read moreRobots.txt Generator
A small file that is easy to get catastrophically wrong, so it is worth generating rather than typing.
Read moreMeta Tag Generator
One set of fields, every tag a page needs, and a warning when something will be cut off.
Read moreSchema Markup Generator
Structured data that describes what is actually on the page, which is the only kind worth adding.
Read moreHreflang Tag Generator
The tags are simple. The rule that makes them work is the one most sites miss.
Read moreAI Tools
Utilities for working with AI search, prompts and structured answers.
URL Slug Generator
Strips accents and punctuation, lowercases everything and joins words with hyphens.
Read moreText Tools
Count, clean, convert and compare text without pasting it into a stranger server.
Word Counter
Live counts for anything you paste, including the character totals that matter for meta fields and social posts.
Read moreCase Converter
Seven conversions, including the programming cases that are tedious to do by hand.
Read moreLorem Ipsum Generator
Filler text for when the real copy is not ready but the layout needs something in it.
Read moreImage Tools
Resize, convert and inspect images entirely inside your own browser.
Image Dimension and Size Inspector
Reads the file in your browser, so a client image never leaves your machine.
Read moreLogo Maker
A small, opinionated logo builder: a name, an optional symbol, and the handful of choices that actually decide whether a logo…
Read moreBusiness Card Maker
Eighty-five by fifty-five millimetres, three millimetre bleed, five millimetre safe area, exported at the resolution print…
Read moreLetterhead Maker
A header that carries the brand, a footer that carries the details, and enough clear space in between for an actual letter.
Read moreAnimated Logo Maker
A fade and scale reveal for a splash screen, a site header or a video intro, in the two formats that play almost anywhere.
Read moreDeveloper Tools
Encoders, formatters, generators and converters for everyday development.
JSON Formatter and Validator
Runs locally, which matters when the JSON contains an API response you should not be pasting elsewhere.
Read moreBase64 Encoder and Decoder
Handles accented and non-Latin text correctly, which many simple implementations do not.
Read moreURL Encoder and Decoder
For query strings, redirect parameters and anything else that has to survive being put in a URL.
Read moreColour Converter and Contrast Checker
Includes the contrast ratios that decide whether text on that colour is readable.
Read moreJWT Decoder
A token is often a working credential. This one decodes it in your browser, which is the only sane place to do it.
Read moreUUID Generator
Up to five hundred at a time, in the format your system expects.
Read moreUnix Timestamp Converter
Paste either a timestamp or a date and get every other representation back at once.
Read moreRegex Tester
Including the zero-length match trap that makes a pattern loop for ever.
Read moreCSV to JSON Converter
The parsing most quick scripts get wrong, done correctly, without uploading a client export.
Read moreWebsite Tools
Practical checks for the technical side of running a site.
Favicon Generator
Not one 16 pixel icon, but the six sizes a browser tab, a bookmark, an Android home screen and an iOS home screen each ask for.
Read moreMarketing Tools
Build, check and plan the pieces campaigns are made of.
A/B Test Significance Calculator
Find out whether variant B really beat variant A, by how much, and how many visitors a reliable test needs.
Read moreAd Performance Calculator
Turn an ad budget into expected impressions, clicks, conversions and cost per result, then compare six platforms side by side.
Read moreAd Revenue Calculator
Estimate monthly display ad earnings from pageviews, ads per page, fill rate and CPM, with page RPM.
Read moreAgency Profit Calculator
Calculate agency gross income, delivery margin and operating profit after salaries, freelancers and overheads.
Read moreBrand Awareness Reach Calculator
Estimate how many people an awareness campaign reaches, how often they see it and the cost per thousand people reached.
Read moreContent Marketing ROI Calculator
Work out the return on content marketing from visits, conversion rates and customer value.
Read moreCPM, CPC and CTR Calculator
Turn raw campaign numbers into CPM, CPC, CTR, conversion rate and CPA, or work backwards from a goal to the budget it needs.
Read moreCustomer Lifetime Value Calculator
Estimate what a customer is worth over the whole relationship, and how much you can afford to spend to win one.
Read moreEmail List Growth Calculator
Forecast the size of an email list month by month from new sign-ups and the rate subscribers leave.
Read moreEmail Marketing ROI Calculator
Estimate monthly revenue and return from email campaigns using list size, click rate, conversion rate and order value.
Read moreGoogle Ads Quality Score Calculator
Estimate how raising your Google Ads Quality Score could change cost per click and monthly spend.
Read moreInfluencer Pricing Calculator
Estimate a fair influencer fee from followers, engagement rate, deliverables and usage rights.
Read moreInstagram Engagement Rate Calculator
Calculate Instagram engagement rate from likes, comments, saves and shares, by followers and by reach.
Read moreNewsletter Monetization Calculator
Estimate newsletter income from sponsorships priced per thousand opens and from paid subscriptions.
Read moreNPS Calculator
Calculate Net Promoter Score from survey responses and see how winning back detractors would change it.
Read morePodcast Sponsorship Rate Calculator
Price podcast ad reads by CPM for pre-roll, mid-roll and post-roll slots, per episode and per month.
Read moreROAS Calculator
Work out return on ad spend, the ROAS you need to break even, and whether a campaign is actually making a profit.
Read moreSEO Traffic Value Calculator
Estimate the monthly value of organic search traffic from keyword volumes, click-through rates and CPCs.
Read moreSocial Media Follower Growth Calculator
Forecast follower growth from a monthly growth rate and find how long it takes to reach a target.
Read moreTikTok Creator Earnings Estimator
Estimate TikTok income from qualified views at a Creator Rewards RPM plus brand partnerships.
Read moreVideo Ad Production Cost Calculator
Budget a video ad from crew days, talent, locations, editing, motion graphics, music and contingency.
Read moreYouTube Revenue Estimator
Estimate YouTube ad earnings from views, monetised playback share, CPM and the creator revenue share.
Read moreUTM Link Builder
Consistent tagging is the difference between analytics that answer questions and analytics that raise them.
Read moreEmail Signature Maker
Table-based HTML with the image inline, because that is what email clients actually render in 2026.
Read moreSecurity and Utility Tools
Generate, hash and inspect, without sending a secret anywhere.
Password Generator
Generated locally and never transmitted, which is the only way a generated password is worth using.
Read moreSHA Hash Generator
Uses the browser built-in cryptography, so the input never leaves your machine.
Read moreFile Tools
Convert and inspect files in the browser, with nothing uploaded.
File Type and Size Inspector
For when you need the facts about a file and would rather not upload it to find out.
Read moreCalculators
The sums that come up often enough to be worth a page.
1031 Exchange Calculator
Estimate the capital gains and depreciation recapture tax a US 1031 exchange defers, and the tax due on any boot received.
Read more401(k) Contribution Optimizer
Calculate your 401(k) contribution, employer match, match left unclaimed, contribution limit room and tax saving.
Read more529 College Savings Calculator
Project 529 plan savings by the time a child starts college, compare them with projected costs and find the monthly saving needed.
Read moreA/B Test Significance Calculator
Find out whether variant B really beat variant A, by how much, and how many visitors a reliable test needs.
Read moreAccessible Ramp Calculator
Calculate wheelchair ramp length, intermediate landings and total length from the rise and slope, with key clearance figures.
Read moreAccounts Payable Aging Calculator
Analyse bills owed by age bucket, the share overdue and the late fee exposure on overdue balances.
Read moreAccounts Payable Days Calculator
Calculate days payables outstanding, payables turnover and the cash effect of changing supplier payment timing.
Read moreAccounts Receivable Aging Calculator
Analyse receivables by age bucket, the share overdue and an expected-loss bad debt allowance.
Read moreAccounts Receivable Days Calculator
Calculate days sales outstanding, receivables turnover and the cash released by collecting faster.
Read moreAccrued Expenses Calculator
Calculate month-end accruals for expenses incurred but not yet invoiced or paid, prorated by days.
Read moreAd Performance Calculator
Turn an ad budget into expected impressions, clicks, conversions and cost per result, then compare six platforms side by side.
Read moreAd Revenue Calculator
Estimate monthly display ad earnings from pageviews, ads per page, fill rate and CPM, with page RPM.
Read moreAfter-school Programme Cost Calculator
Calculate after-school programme costs per student per day and month from staffing ratios, snacks, supplies and space, and the…
Read moreAgency Profit Calculator
Calculate agency gross income, delivery margin and operating profit after salaries, freelancers and overheads.
Read moreAirbnb Income Estimator
Estimate short-term rental revenue, costs and monthly profit from nightly rate, occupancy, cleaning fees and platform fees.
Read moreAlimony Calculator
Estimate spousal support with the American Academy of Matrimonial Lawyers guideline formula, including the 40% cap and suggested…
Read moreAmazon FBA Fee Calculator
Calculate Amazon FBA profit per unit after referral, fulfilment, storage and advertising costs, with break-even ACoS.
Read moreAnnual Fund Goal Calculator
Project next year's annual fund from donor retention, gift growth and new donors, and find how many new donors are needed to…
Read moreAnnuity Payout Calculator
Calculate the regular payout a lump sum can provide for a fixed number of years at a given interest rate.
Read moreApp Store Revenue Calculator
Estimate app revenue from downloads, paid conversion, subscription price and ads, after app store commission.
Read moreARR Growth Calculator
Project annual recurring revenue at a growth rate and find the growth needed to hit an ARR target on time.
Read moreArt Commission Pricing Calculator
Price an art commission from size, hours, materials, complexity and usage rights, with a deposit amount.
Read moreAsphalt Paving Calculator
Calculate tons of asphalt for a driveway or car park from area and thickness, plus material cost.
Read moreAuthor Royalty Estimator
Estimate book royalties by format from copies sold, prices and royalty rates, the advance earn-out and the agent's commission.
Read moreAuto Insurance Coverage Calculator
Get suggested auto liability limits based on what you could lose in a lawsuit, and check whether collision and comprehensive…
Read moreAV Equipment Budget Calculator
Budget audio-visual equipment for an event: sound, microphones, projection, lighting, streaming, technicians and delivery.
Read moreBad Debt Reserve Calculator
Calculate a bad debt reserve by the percentage-of-sales or percentage-of-receivables method and the adjustment to book.
Read moreBAH Housing Budget Calculator
Compare housing costs with your Basic Allowance for Housing to see the monthly surplus or shortfall and the rent that fits…
Read moreBank Reconciliation Calculator
Reconcile a bank statement with your books by adjusting for deposits in transit, outstanding cheques, fees and errors.
Read moreBankruptcy Means Test Calculator
Check the US Chapter 7 means test: compare income with the state median, then test monthly disposable income over 60 months.
Read moreBar Pour Cost Calculator
Calculate the cost per pour, pour cost percentage and price for a target pour cost from bottle price, size and pour size.
Read moreBenefits Cliff Calculator
Calculate the net effect of a pay rise after extra taxes and lost public benefits, and the effective marginal tax rate.
Read moreBenefits Cost per Employee Calculator
Calculate total benefits cost per employee per year and month, and benefits as a share of payroll.
Read moreBillable Hours Calculator
Total time entries into billable hours using minimum billing increments such as 0.1 hour, and calculate the fees by rate.
Read moreBillable Utilisation Calculator
Calculate billable utilisation for a person or team, compare it with target, and the revenue gained by reaching target.
Read moreBlood Pressure Category Calculator
Find the adult blood pressure category for a reading using the 2017 American College of Cardiology and American Heart…
Read moreBMI Calculator
Calculate body mass index from height and weight in metric or imperial units, its adult category and the weight range for a…
Read moreBoard Foot Calculator
Calculate board feet and cost for a list of lumber pieces from thickness, width, length, quantity and price per board foot.
Read moreBody Fat Calculator
Estimate body fat percentage with the US Navy circumference method from height, neck, waist and hip measurements.
Read moreBoiler Sizing Calculator
Estimate boiler output needed for space heating from heat loss, and for instant hot water from flow and temperature rise.
Read moreBond Yield to Maturity Calculator
Calculate a bond's yield to maturity, current yield and the approximate YTM from price, coupon, face value and years to maturity.
Read moreBonus Tax Calculator
Estimate the take-home amount of a US bonus after the 22% federal supplemental withholding, FICA and state tax.
Read moreBrand Awareness Reach Calculator
Estimate how many people an awareness campaign reaches, how often they see it and the cost per thousand people reached.
Read moreBreak-even Calculator
Find the break-even point in units and revenue, the sales needed for a profit target and your margin of safety.
Read moreBreak-even Oil Price Calculator
Calculate the oil price at which a well or field breaks even, from operating costs, royalties, taxes, transport and capital…
Read moreBreak-even Yield Calculator
Calculate the yield needed to cover per-acre costs at a given price, and the break-even price at your expected yield.
Read moreBRRRR Strategy Calculator
Analyse a BRRRR deal: cash invested, cash-out refinance, cash left in the deal, monthly cash flow and cash-on-cash return.
Read moreBurn Rate and Runway Calculator
Calculate gross and net burn rate and how many months of runway your cash gives, with optional revenue growth.
Read moreBusiness Overhead Expense Calculator
Total your monthly overheads and calculate the overhead rate per labour hour and as a share of revenue.
Read moreBusiness Valuation Calculator
Value a business with SDE, EBITDA and revenue multiples and a single-stage discounted cash flow, side by side.
Read moreFree strategy session
Let’s build something worth finding.
Tell us where you want the business to be in twelve months. We will come back with a costed plan, a realistic timeline, and the numbers we expect to move — no obligation, no jargon.
- 30-minute call, no pitch deck
- Fixed-price proposal in 48 hours
- You own everything we build
Talk to a developer
Not a sales team
- Response time
- Within 1 business hour
- Where we work
- UK, USA & the Gulf
- Contracts
- No lock-in, monthly rolling
- Working since
- 2023