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🔥 Popular: Problem Diagnosis PDF Merger Signature Maker AI Cost Calculator SaaS Health Scorecard Free Invoice Generator Free QR Code Generator Strong Password Generator llms.txt Generator
Start here 1
Problem DiagnosisA 3-step consultation that drills past the symptom to your real operational bottleneck, then recommends the tools that actually fix it.
PDF & files 4
PDF MergerCombine multiple PDFs into one, 100% in your browser.
Signature MakerDraw your signature with mouse, trackpad or finger and download a transparent PNG.
Image Resizer & WebP ConverterResize, compress and convert JPG/PNG to WebP entirely in your browser.
Image CompressorShrink JPG and PNG file sizes in your browser with an adjustable quality slider.
Calculators 23
Percentage CalculatorWhat is X% of Y, X is what % of Y, and percentage change from A to B.
Date & Deadline CalculatorDays between two dates (calendar and weekdays) and deadlines N days or business days ahead.
Renewal RadarGet a .ics calendar file that reminds you before every cancel window closes.
AI Cost CalculatorEstimate your LLM API bill from tokens per request and volume across model tiers.
AI Token CounterPaste text and estimate its LLM token count, plus how much of an 8k/32k/128k/200k context window it fills.
Startup Financial ModelProject 24 months of MRR, cash runway and break-even from your growth, churn, margin and burn, with a live chart.
Cap Table & Dilution CalculatorSee how founders and investors dilute across seed, Series A and B rounds, with an ownership breakdown and chart.
SaaS Valuation CalculatorEstimate your company's worth from ARR, growth and margin using revenue multiples and the Rule of 40.
ROI & Payback CalculatorEnter an investment, monthly return and cost to get your ROI, payback period and net gain, with a cumulative cash-flow chart.
Loan & Amortization CalculatorEnter amount, interest rate and term to get your monthly payment, total interest and a balance chart.
A/B Test Significance CalculatorEnter visitors and conversions for each variant to get conversion rates, uplift and statistical significance (p-value).
A/B Test Sample Size CalculatorWork out how many visitors per variant you need to detect a given uplift at 95% confidence and 80% power.
Profit Margin CalculatorEnter your cost and selling price to get the profit, margin percentage and markup.
VAT & Sales Tax CalculatorAdd tax to a net amount or extract it from a gross amount at any rate.
Payment Fee CalculatorSee what Stripe, PayPal or any processor takes from a transaction, and what you actually receive.
Discount CalculatorEnter the original price and discount percentage to get the sale price and how much you save.
Break-Even CalculatorEnter fixed costs, price and variable cost per unit to find how many units you must sell to break even.
Freelance Hourly Rate CalculatorWork out the hourly rate you need to hit your income target after expenses and realistic billable hours.
Salary to Hourly CalculatorConvert an annual salary to an hourly, weekly and monthly rate based on your real working hours.
Dimensional Weight CalculatorEnter parcel dimensions and weight to find the billable weight carriers actually charge on.
Aspect Ratio CalculatorEnter original dimensions and a new width to get the height that keeps the same proportions.
Survey Sample Size CalculatorFind how many people to survey for a given confidence level and margin of error.
Meeting Cost CalculatorEnter attendees, hourly cost and duration to see what a meeting really costs in salaried time.
Growth & marketing metrics 11
SaaS Health ScorecardEnter your ARR, growth, retention, CAC and burn and get Rule of 40, burn multiple, NRR, GRR, quick ratio, CAC payback and LTV/CAC, each graded against the benchmarks.
Landing Page CRO AuditTick the best-practices your page follows and get an instant grade, your weakest area and the fixes that matter most.
ROAS CalculatorEnter ad spend and revenue to get your return on ad spend instantly.
CAC & LTV CalculatorWork out your customer acquisition cost, lifetime value and the all-important LTV:CAC ratio.
Conversion Rate CalculatorEnter visitors and conversions to get your conversion rate instantly.
MRR & ARR CalculatorEnter your customers and average price to get monthly recurring revenue, ARR and a 12-month growth projection.
Pricing Tier Revenue CalculatorModel your MRR, ARR and blended ARPU from your pricing tiers and how customers spread across them.
Cohort Retention & LTV CalculatorEnter cohort size, revenue per user and monthly retention to get the retention curve, average customer lifetime and LTV.
Churn Rate CalculatorEnter customers at the start and how many you lost to get your churn and retention rate.
NPS CalculatorEnter your promoters, passives and detractors to get your Net Promoter Score instantly.
Engagement Rate CalculatorEnter followers, likes and comments to get your social media engagement rate.
Content & SEO 13
llms.txt GeneratorCreate the AI-readability file that tells ChatGPT, Claude and Perplexity what your site is and which pages matter.
OG Image GeneratorCreate 1200×630 social share cards with your title and brand, right in your browser.
SEO Meta Tag & SERP PreviewWrite your title and meta description with live length checks and a Google search (SERP) preview.
Readability CheckerPaste your text to get its Flesch Reading Ease score, grade level and sentence stats.
Keyword Density AnalyzerPaste your content to see the most-used words and their frequency, so you can check focus without keyword-stuffing.
Headline AnalyzerScore your headline on length, numbers and power words, with tips to make it more clickable.
Word & Character CounterPaste text to count words, characters, sentences, paragraphs and reading time instantly.
Colour Contrast CheckerTest text and background colours against WCAG AA and AAA accessibility standards.
Social Share PreviewSee how your link will look when shared on Facebook, LinkedIn and X, with title, description and image.
Social Media Character CounterSee how your post fits the limits for X, LinkedIn, Instagram, Threads, TikTok and Facebook as you type.
FAQ Schema GeneratorTurn questions and answers into valid FAQPage JSON-LD you can paste into your page to be eligible for rich results.
URL Slug GeneratorTurn any title into a clean, SEO-friendly URL slug (lowercase, hyphenated, no special characters).
robots.txt GeneratorBuild a valid robots.txt with allow/disallow rules and your sitemap in seconds.
Email 4
Email Subject Line TesterChecks length, word count, emoji, ALL-CAPS and spam-trigger words, with an inbox preview.
Email Spam Word CheckerPaste your email and it flags spam-trigger phrases, ALL-CAPS and excess punctuation that hurt deliverability.
Email Format FinderEnter a name and company domain to see the most common professional email formats (first.last@, flast@, and more).
Email Signature GeneratorFill in your details and copy a clean, professional HTML signature for Gmail, Outlook and more.
Generators & utilities 22
Text Diff CheckerSee every added and removed word between two versions of a text, highlighted.
Case ConverterSwitch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.
Text CleanerFix broken line breaks from PDFs, collapse double spaces, remove empty lines and straighten smart quotes.
Base64 Encoder / DecoderEntirely in your browser.
CSV ↔ JSON ConverterReal quoting rules, auto-detects comma/semicolon/tab.
UUID Generator1 to 100 at once, standard/uppercase/no-hyphen formats, from your browser's cryptographic randomness.
Lorem Ipsum GeneratorParagraphs, sentences or words of classic placeholder text, generated in your browser.
JSON Formatter & ValidatorPretty-print JSON and find errors with line/column, 100% in your browser.
Privacy Policy GeneratorAnswer a few questions about your site and get a clean, plain-language policy to copy or download.
Business Name GeneratorEnter your core word, pick a style and get 20 brandable name ideas with instant .com domain checks.
Timezone Meeting PlannerPick up to 3 timezones and see a color-coded overlap grid: green when everyone's 9-17, yellow for stretched hours.
Free QR Code GeneratorCreate a QR code from any text or URL and download it as PNG or SVG.
Free Barcode GeneratorCreate CODE128, EAN-13, UPC and CODE39 barcodes in your browser and download them as PNG or SVG.
Strong Password GeneratorCreate a random, secure password with adjustable length and character sets.
Password Strength CheckerEstimates the entropy and rough crack time of a password and tells you how to make it stronger.
Favicon GeneratorCreate a favicon from a letter or emoji with your own colours and shape, and download it as a PNG.
Colour Palette GeneratorPick a base colour and get a matching palette with hex codes for your brand, site or ad creative.
CSS Gradient GeneratorPick two colours and an angle, preview the gradient live, and copy the CSS.
SHA-256 Hash GeneratorTurn any text into a SHA-256 hash in your browser.
Free Invoice GeneratorFill in your details and line items and download a clean PDF invoice in seconds.
UTM Link BuilderAdd trackable utm_source, utm_medium and utm_campaign tags to any URL so you can see exactly which campaign drove each visit.
Pomodoro Focus Timer25-minute focus sessions with 5-minute breaks, right in your browser.
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