Free tools
Free tools for websites, apps and AI.
122 small, fast tools we use on client work. Everything runs in your browser: nothing is uploaded, nothing is stored, and there is no signup.
SEO
Meta tags, schema, redirects and sitemaps.
- Meta title & description length checkerCheck titles and descriptions against Google's display limits as you type.
- Google SERP snippet previewSee how your title, URL and description look in search results on desktop and mobile.
- URL slug generatorTurn a headline into a clean, hyphenated slug.
- Robots.txt generatorBuild a robots.txt from allow and disallow rules plus your sitemap URL.
- Robots.txt testerPaste a robots.txt and a URL to see whether a bot may crawl it.
- XML sitemap generatorPaste a list of URLs and get a valid sitemap.xml.
- FAQ schema generatorBuild FAQPage JSON-LD from question and answer pairs.
- Article schema generatorJSON-LD for blog posts with author, dates and image.
- Local business schema generatorJSON-LD with address, opening hours, phone and map coordinates.
- Product schema generatorJSON-LD with price, availability and ratings for product pages.
- Breadcrumb schema generatorBreadcrumbList JSON-LD from a list of pages.
- Organization schema generatorJSON-LD with logo, contact points and social profiles.
- Hreflang tag generatorBuild hreflang tags for a set of language and region URLs, with x-default.
- Open Graph & Twitter card generatorBuild social sharing meta tags with a live preview card.
- Meta tags generatorA complete head block: title, description, canonical, robots and Open Graph.
- Keyword density checkerCount one, two and three word phrases in any text.
- Word & character counterWords, characters, sentences, paragraphs and reading time.
- Readability checkerFlesch reading ease and grade level for any text.
- 301 redirect generatorPaste old and new URL pairs, get redirect rules for .htaccess, Nginx and Next.js.
- Canonical tag generatorBuild correct canonical tags and understand self-referencing canonicals.
Links & embeds
Tracking links, WhatsApp buttons, QR codes and embeds.
- UTM link builderBuild tagged campaign URLs with presets for common channels.
- WhatsApp link generatorCreate a wa.me link with a pre-filled message, plus a QR code.
- WhatsApp chat button generatorCopy-paste HTML and CSS for a floating WhatsApp button on your site.
- Mailto link generatorEmail links with subject, body, cc and bcc filled in.
- Click-to-call link generatorCorrect tel: links for international phone numbers.
- Google Maps embed generatorA responsive map embed from an address or place name.
- YouTube embed generatorResponsive, privacy-enhanced embeds with start time and options.
- Add to calendar link generatorGoogle, Outlook and .ics links for an event.
- QR code generatorQR codes for URLs, text, Wi-Fi and contact cards. Download as SVG or PNG.
- Social share link generatorShare URLs for X, LinkedIn, Facebook, WhatsApp, Telegram and email.
Design & CSS
Colours, type scales, shadows, grids and generators.
- Colour converterConvert between HEX, RGB, HSL and OKLCH.
- Colour contrast checkerWCAG AA and AAA contrast ratios for text and interface elements.
- Colour palette generatorTints, shades and harmonies from one colour, exported as CSS variables.
- CSS gradient generatorLinear, radial and conic gradients with live preview and copyable CSS.
- Box shadow generatorLayered shadows with a live preview, output as CSS or Tailwind.
- Border radius generatorPer-corner and elliptical radii with a live preview.
- Fluid typography clamp() calculatorGenerate a CSS clamp() from min and max sizes and a viewport range.
- px to rem converterConvert px to rem and back with any base font size.
- Type scale generatorA modular type scale from a base size and ratio, as CSS variables.
- Line height calculatorA recommended line height from font size and line length.
- CSS grid generatorA visual column, row and gap editor with copyable CSS.
- Flexbox playgroundToggle flex properties and copy the resulting CSS.
- Aspect ratio calculatorFind a missing dimension from a ratio, plus the CSS aspect-ratio value.
- Favicon generatorUpload a PNG or SVG and download every favicon size plus the head tags.
- SVG optimiserMinify SVG files in the browser and see the saving.
- SVG to CSS data URIEncode an SVG for use in background-image.
- CSS minifier & beautifierMinify or format pasted CSS.
- Tailwind colour to HEXLook up any Tailwind v4 colour token and copy its value.
- CSS triangle generatorBorder-based triangles in any direction and size.
- Glassmorphism CSS generatorBlur, transparency and border with a live preview.
- Placeholder image generatorDownloadable SVG placeholders at any size, colour and label.
- Lorem ipsum generatorParagraphs, sentences or words, as plain text or HTML.
Images & performance
Compress, convert and resize in the browser.
- Image compressorCompress JPG, PNG and WebP in your browser. Nothing is uploaded.
- Image to WebP converterConvert images to WebP in the browser with a quality slider.
- Image resizerResize by pixels or percent while keeping the aspect ratio.
- Responsive image srcset generatorBuild srcset and sizes markup for a set of image widths.
- Core Web Vitals checkerEnter LCP, INP and CLS to see pass or fail against Google's thresholds.
- Page weight budget calculatorAdd up your page resources and see load times on 3G and 4G.
- Bandwidth cost calculatorPage size times visits, as gigabytes and hosting cost.
- App icon generatorOne 1024px PNG becomes every iOS and Android icon size, zipped.
- Open Graph image size checkerCheck an image against Open Graph, X and LinkedIn dimensions.
- EXIF data viewer & removerSee and strip metadata from photos without uploading them.
Developer utilities
Formatters, converters, encoders and testers.
- JSON formatter & validatorPretty-print, minify and validate JSON with the error line shown.
- JSON to TypeScriptGenerate TypeScript interfaces from a JSON sample.
- JSON to CSVFlatten an array of objects into CSV.
- CSV to JSONParse CSV with a header row into JSON.
- YAML to JSON converterConvert YAML to JSON and back.
- Base64 encoder & decoderEncode text or files to Base64 and decode them back.
- URL encoder & decoderPercent-encode and decode URLs and query strings.
- HTML entity encoder & decoderEscape and unescape HTML characters.
- Regex testerLive matches and capture groups with a cheat sheet.
- Cron expression generatorBuild and explain cron schedules, with the next run times.
- UUID generatorGenerate v4 and v7 UUIDs in bulk.
- Password generatorStrong passwords and passphrases, generated in your browser.
- Hash generatorMD5, SHA-1, SHA-256 and SHA-512 hashes of any text.
- JWT decoderDecode a JSON Web Token's header and payload and check its expiry.
- Unix timestamp converterConvert between epoch time and dates in any timezone.
- Markdown to HTMLLive preview and copyable HTML from Markdown.
- HTML to MarkdownConvert pasted HTML to clean Markdown.
- Text diff checkerCompare two texts and highlight the differences.
- Case convertercamelCase, snake_case, kebab-case, Title Case and more.
- HTML formatter & minifierFormat or minify HTML.
- JavaScript beautifierFormat pasted JavaScript or TypeScript.
- SQL formatterFormat SQL with consistent keyword casing and indentation.
- .env to JSON converterConvert env files to JSON and back for config tools.
- .gitignore generatorPick your stack and get a combined .gitignore.
- Chmod calculatorPermission checkboxes, octal and symbolic notation, kept in sync.
- Number base converterBinary, octal, decimal and hexadecimal.
- Unicode character inspectorCode points, names and byte lengths of any text.
- HTTP status code referenceA searchable list with plain-English meanings and when you will see each one.
AI & automation
Token counts, API costs and automation returns.
- Token counterCount tokens for OpenAI and Claude models from pasted text.
- AI API cost calculatorTokens per request, requests per month and model prices, as a monthly bill.
- Chatbot ROI calculatorTickets deflected, handling time and agent cost, as a monthly saving.
- Automation hours-saved calculatorTask minutes, frequency and people, as hours and cost saved per year.
- Context window checkerWill this document fit in a model's context, with room for the answer?
- RAG chunk size calculatorDocument length and chunk settings, as chunk count and embedding cost.
- Prompt template builderRole, task, context, format and examples, assembled into a structured prompt.
- System prompt budget checkerFlag long system prompts and estimate their cost per call.
- AI vs human cost comparisonPer-task cost comparison with the volume where each wins.
- Webhook payload formatterFormat and validate JSON payloads, with samples for Stripe, Razorpay and WhatsApp.
Business & pricing
Project costs, fees, margins and returns.
- Website cost calculatorPages, features, CMS and design level, as an estimate range with the assumptions shown.
- Mobile app cost calculatorPlatforms, features, backend and design, as an estimate range.
- Website ROI calculatorVisitors, conversion rate, lead value and build cost, as payback time.
- Conversion rate calculatorConversions divided by visitors, with uplift scenarios.
- Bounce rate & engagement calculatorFrom sessions and engaged sessions, in GA4 terms.
- Customer acquisition cost calculatorSpend divided by new customers, per channel.
- Customer lifetime value calculatorARPU, margin and churn, as LTV and the LTV to CAC ratio.
- Break-even calculatorFixed costs, price and variable cost, as units to break even.
- Profit margin & markup calculatorMargin and markup in both directions.
- Discount calculatorFinal price, saving and percentage off.
- GST calculator (India)Add or remove GST at 5, 12, 18 or 28 percent, with the CGST and SGST split.
- Stripe fee calculatorWhat to charge to receive a net amount, with regional rates.
- Razorpay fee calculatorPlatform fee and GST on the fee, for domestic and international cards.
- PayPal fee calculatorFees by country and transaction type.
- Shopify fee calculatorPlan and transaction fees per order and per month.
- Freelance hourly rate calculatorTarget income, costs and billable hours, as an hourly rate.
- Website hosting cost calculatorTraffic and page size, as an estimated monthly cost on common hosts.
- Project timeline estimatorPhases and team size, as weeks with a dependency buffer.
Legal & site essentials
Policy templates, consent banners and email signatures.
- Privacy policy generatorA plain-English privacy policy template for a business website. Review it with a lawyer.
- Terms of service generatorA terms of service template for a website or web app. Review it with a lawyer.
- Cookie consent banner generatorCopy-paste HTML, CSS and JS for a cookie banner that blocks analytics until visitors agree.
- Email signature generatorA clean HTML email signature that works in Gmail, Outlook and Apple Mail.
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India · Working with clients worldwide