ApolloTop pick
Best for small sales teams paying for several tools
Sounds like you? “I pay for contact data, enrichment and sequences in three separate tools.”
Plan that fits: Basic, $49 per seat/mo billed annually ($65 monthly)
AIBuilder Marketplace › Free tools
Free tools for everyday business tasks
Calculate costs, prepare files and check your content. 77 tools, free to use without an account. Start with a task or search for a tool.
Start with a task
Plan an AI budgetMonthly cost, cost per task and what fits your budget, for up to three setups.PDF reportCreate an invoiceLive paper preview, three styles and your logo, then a clean PDF.PDF invoiceCheck a campaign's returnROAS, break-even and what is left after ads, three scenarios side by side.PDF reportMake a QR codeLinks, Wi-Fi or contact cards, in your colours and with your logo.PNG · SVGMerge PDF filesReorder files and pick pages. Nothing is uploaded.Merged PDFCheck how readable a text isScore, grade level and the hard sentences marked in your text.Marked-up text
Outgrown the free tools?
When the spreadsheet or the one-off calculator stops being enough, these are the tools readers move to.
Best for small businesses wanting AI to answer routine chats
Sounds like you? “Customers message my website and social channels at night and nobody answers.”
Plan that fits: Pro, $59.99 per user a month (1,000 AI conversations); 15-day free trial, no long-term contract
Best for sales and support teams of 3+ living in a CRM
Sounds like you? “My reps call from HubSpot or Salesforce all day and I want calls logged without extra steps.”
Plan that fits: Professional, $50 per licence a month on annual billing ($70 monthly), minimum 3 licences; Essentials is $30 ($40 monthly)
Best for small businesses with a few bills a month
Sounds like you? “I want to pay suppliers by bank transfer without paying a monthly subscription.”
Plan that fits: Go, free (5 free ACH a month, then $0.50 each; 1 user)
Picked from our review dossiers: who each tool suits, their problem in their words, and the plan that fits. “Try” buttons are affiliate links: we may earn a commission if you sign up, at no extra cost to you. It never changes our verdict.
PDF & files 4
PDF MergerCombine multiple PDFs into one, 100% in your browser.Merged PDF
Signature MakerDraw your signature with mouse, trackpad or finger and download a transparent PNG.Transparent PNG
Image Resizer & WebP ConverterResize, compress and convert JPG/PNG to WebP entirely in your browser.Image download
Image CompressorShrink JPG and PNG file sizes in your browser with an adjustable quality slider.Preview & download
Calculators 22
Percentage CalculatorWhat is X% of Y, X is what % of Y, and percentage change from A to B.Instant answer
Date & Deadline CalculatorDays between two dates (calendar and weekdays) and deadlines N days or business days ahead.Instant answer
AI Cost CalculatorEstimate your LLM API bill from tokens per request and volume across model tiers.PDF report · scenarios
AI Token CounterPaste text and estimate its LLM token count, plus how much of an 8k/32k/128k/200k context window it fills.Copy result
Startup Financial ModelProject 24 months of MRR, cash runway and break-even from your growth, churn, margin and burn, with a live chart.PDF report · scenarios
Cap Table & Dilution CalculatorSee how founders and investors dilute across seed, Series A and B rounds, with an ownership breakdown and chart.PDF report · scenarios
SaaS Valuation CalculatorEstimate your company's worth from ARR, growth and margin using revenue multiples and the Rule of 40.PDF report · scenarios
ROI & Payback CalculatorEnter an investment, monthly return and cost to get your ROI, payback period and net gain, with a cumulative cash-flow chart.PDF report · scenarios
Loan & Amortization CalculatorEnter amount, interest rate and term to get your monthly payment, total interest and a balance chart.PDF report · scenarios
A/B Test Significance CalculatorEnter visitors and conversions for each variant to get conversion rates, uplift and statistical significance (p-value).PDF report · scenarios
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.PDF report · scenarios
Profit Margin CalculatorEnter your cost and selling price to get the profit, margin percentage and markup.PDF report · scenarios
VAT & Sales Tax CalculatorAdd tax to a net amount or extract it from a gross amount at any rate.PDF report · scenarios
Payment Fee CalculatorSee what Stripe, PayPal or any processor takes from a transaction, and what you actually receive.PDF report · scenarios
Discount CalculatorEnter the original price and discount percentage to get the sale price and how much you save.PDF report · scenarios
Break-Even CalculatorEnter fixed costs, price and variable cost per unit to find how many units you must sell to break even.PDF report · scenarios
Freelance Hourly Rate CalculatorWork out the hourly rate you need to hit your income target after expenses and realistic billable hours.PDF report · scenarios
Salary to Hourly CalculatorConvert an annual salary to an hourly, weekly and monthly rate based on your real working hours.PDF report · scenarios
Dimensional Weight CalculatorEnter parcel dimensions and weight to find the billable weight carriers actually charge on.PDF report · scenarios
Aspect Ratio CalculatorEnter original dimensions and a new width to get the height that keeps the same proportions.PDF report · scenarios
Survey Sample Size CalculatorFind how many people to survey for a given confidence level and margin of error.PDF report · scenarios
Meeting Cost CalculatorEnter attendees, hourly cost and duration to see what a meeting really costs in salaried time.PDF report · scenarios
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.PDF report · scenarios
Landing Page CRO AuditTick the best-practices your page follows and get an instant grade, your weakest area and the fixes that matter most.PDF report · scenarios
ROAS CalculatorEnter ad spend and revenue to get your return on ad spend instantly.PDF report · scenarios
CAC & LTV CalculatorWork out your customer acquisition cost, lifetime value and the all-important LTV:CAC ratio.PDF report · scenarios
Conversion Rate CalculatorEnter visitors and conversions to get your conversion rate instantly.PDF report · scenarios
MRR & ARR CalculatorEnter your customers and average price to get monthly recurring revenue, ARR and a 12-month growth projection.PDF report · scenarios
Pricing Tier Revenue CalculatorModel your MRR, ARR and blended ARPU from your pricing tiers and how customers spread across them.PDF report · scenarios
Cohort Retention & LTV CalculatorEnter cohort size, revenue per user and monthly retention to get the retention curve, average customer lifetime and LTV.PDF report · scenarios
Churn Rate CalculatorEnter customers at the start and how many you lost to get your churn and retention rate.PDF report · scenarios
NPS CalculatorEnter your promoters, passives and detractors to get your Net Promoter Score instantly.PDF report · scenarios
Engagement Rate CalculatorEnter followers, likes and comments to get your social media engagement rate.PDF report · scenarios
Content & SEO 13
llms.txt GeneratorCreate the AI-readability file that tells ChatGPT, Claude and Perplexity what your site is and which pages matter.Copy result
OG Image GeneratorCreate 1200×630 social share cards with your title and brand, right in your browser.Preview & download
SEO Meta Tag & SERP PreviewWrite your title and meta description with live length checks and a Google search (SERP) preview.Preview & download
Readability CheckerPaste your text to get its Flesch Reading Ease score, grade level and sentence stats.Copy result
Keyword Density AnalyzerPaste your content to see the most-used words and their frequency, so you can check focus without keyword-stuffing.Copy result
Headline AnalyzerScore your headline on length, numbers and power words, with tips to make it more clickable.Copy result
Word & Character CounterPaste text to count words, characters, sentences, paragraphs and reading time instantly.Copy result
Colour Contrast CheckerTest text and background colours against WCAG AA and AAA accessibility standards.Preview & download
Social Share PreviewSee how your link will look when shared on Facebook, LinkedIn and X, with title, description and image.Preview & download
Social Media Character CounterSee how your post fits the limits for X, LinkedIn, Instagram, Threads, TikTok and Facebook as you type.Copy result
FAQ Schema GeneratorTurn questions and answers into valid FAQPage JSON-LD you can paste into your page to be eligible for rich results.Copy result
URL Slug GeneratorTurn any title into a clean, SEO-friendly URL slug (lowercase, hyphenated, no special characters).Copy result
robots.txt GeneratorBuild a valid robots.txt with allow/disallow rules and your sitemap in seconds.Copy result
Email 4
Email Subject Line TesterChecks length, word count, emoji, ALL-CAPS and spam-trigger words, with an inbox preview.Copy result
Email Spam Word CheckerPaste your email and it flags spam-trigger phrases, ALL-CAPS and excess punctuation that hurt deliverability.Copy result
Email Format FinderEnter a name and company domain to see the most common professional email formats (first.last@, flast@, and more).Copy result
Email Signature GeneratorFill in your details and copy a clean, professional HTML signature for Gmail, Outlook and more.Preview & download
Generators & utilities 22
Text Diff CheckerSee every added and removed word between two versions of a text, highlighted.Copy result
Case ConverterSwitch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.Copy result
Text CleanerFix broken line breaks from PDFs, collapse double spaces, remove empty lines and straighten smart quotes.Copy result
Base64 Encoder / DecoderEntirely in your browser.Copy result
CSV ↔ JSON ConverterReal quoting rules, auto-detects comma/semicolon/tab.Copy result
UUID Generator1 to 100 at once, standard/uppercase/no-hyphen formats, from your browser's cryptographic randomness.Copy result
Lorem Ipsum GeneratorParagraphs, sentences or words of classic placeholder text, generated in your browser.Copy result
JSON Formatter & ValidatorPretty-print JSON and find errors with line/column, 100% in your browser.Copy result
Privacy Policy GeneratorAnswer a few questions about your site and get a clean, plain-language policy to copy or download.Preview & download
Business Name GeneratorEnter your core word, pick a style and get 20 brandable name ideas with instant .com domain checks.Preview & download
Timezone Meeting PlannerPick up to 3 timezones and see a color-coded overlap grid: green when everyone's 9-17, yellow for stretched hours.Shareable link
Free QR Code GeneratorCreate a QR code from any text or URL and download it as PNG or SVG.Preview & download
Free Barcode GeneratorCreate CODE128, EAN-13, UPC and CODE39 barcodes in your browser and download them as PNG or SVG.Preview & download
Strong Password GeneratorCreate a random, secure password with adjustable length and character sets.Copy result
Password Strength CheckerEstimates the entropy and rough crack time of a password and tells you how to make it stronger.Copy result
Favicon GeneratorCreate a favicon from a letter or emoji with your own colours and shape, and download it as a PNG.Preview & download
Colour Palette GeneratorPick a base colour and get a matching palette with hex codes for your brand, site or ad creative.Preview & download
CSS Gradient GeneratorPick two colours and an angle, preview the gradient live, and copy the CSS.Preview & download
SHA-256 Hash GeneratorTurn any text into a SHA-256 hash in your browser.Copy result
Free Invoice GeneratorSee the invoice as you type and download a clean PDF.PDF invoice
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.Copy result
Pomodoro Focus Timer25-minute focus sessions with 5-minute breaks, right in your browser.Timer in your browser
Start here 1
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Try a broader term like “calculator”, “email” or “seo”.
Try a broader term like “calculator”, “email” or “seo”.
The calculations run in your browser. Each tool page explains what the result means and where its limits are.