Fast, private tools for developers and makers.

Build SEO + Open Graph meta tags.

Generate a valid robots.txt file.

Build a sitemap from a URL list.

JSON-LD structured data for rich results.

Design a social share image, export PNG.

Tag campaign links for analytics.

Format, validate and beautify JSON.

Compare two JSON documents structurally.

Convert a JSON array to CSV.

Convert CSV to a JSON array.

Convert JSON to well-formed XML.

Validate and pretty-print XML.

Convert YAML config to JSON.

Check YAML syntax and find errors.

Encode or decode Base64 strings.

Percent-encode or decode URLs.

Convert text to hex bytes and back.

Escape and unescape HTML entities.

Decode and inspect JSON Web Tokens.

Pretty-print and format SQL queries.

Minify CSS to shrink file size.

Minify JavaScript with Terser.

Minify HTML markup.

Generate TypeScript interfaces from JSON.

Generate Go structs from JSON.

Test regular expressions with live matches.

Explain cron and see next run times.

Convert Unix timestamps to dates.

Compare two texts side by side.

Convert Markdown to HTML and back.

camelCase, snake_case, Title Case and more.

Count words, characters and reading time.

Generate placeholder text.

Binary, octal, decimal and hex.

Text to binary and ASCII, and back.

Build Markdown tables visually.

A full-screen countdown with alarm.

Text ↔ Morse, with audio.

Create strong random passwords.

Memorable multi-word passphrases.

Generate v4 UUIDs / GUIDs.

MD5, SHA-1 and SHA-256 hashes.

Realistic names for test data.

Unique handles from word pairs.

Pick a color, get HEX / RGB / HSL.

Harmonies and image extraction.

Build linear/radial gradients.

Check WCAG contrast ratios.

Resize while keeping proportions.

Brandable domain ideas from a keyword.

Make QR codes for links, WiFi and more.

EAN, UPC, Code 128, Data Matrix and more.

.ico + PWA icon suite from one image.

Shrink JPEG, PNG and WebP locally.

Resize, scale and rotate images.

Convert between PNG, JPEG and WebP.

Remove metadata and GPS from photos.

Combine images into one PDF.

Vectorize logos and icons to SVG.

Rasterize SVG to a high-res PNG.

Encode images to a data URI and back.

Combine PDFs in your browser.

Extract or split PDF pages.

Reduce PDF file size locally.

Reorder, rotate and delete pages.

Complete and flatten PDF forms.

Convert PDF pages to JPG or PNG.

Create and download invoices as PDF.

Make an invoice online, no sign-up.

Fill a form, download a PDF invoice.

Proforma invoices for quotes & customs.

Bill labour and materials.

Bill hourly or per project.

Hourly, day-rate or retainer.

Bill rent per period.

Customs-ready export invoice.

Send a PO to a supplier.

Price quotes with a valid-until date.

Margin, markup and profit.

Design a card, export PNG or PDF.

Build an HTML email signature.

Build a GDPR/CCPA-ready privacy policy.

Build terms of service for site or app.

Look up domain registration records.

Query A, AAAA, MX, TXT and more.

Inspect a site’s TLS certificate.

Inspect a URL’s response headers.

Geolocate an IP and find its network.

Find the PTR hostname of an IP.

Look up US healthcare providers.

Decode an FCC ID and find records.

Validate and decode a US EIN.

Check syntax, MX and disposable domains.

Find the vendor behind a MAC address.

Validate an IBAN and decode it.

Validate and decode a SWIFT/BIC.

Look up an autonomous system number.

Decode a vehicle VIN (NHTSA data).