All tools

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.

Encode or decode Base64 strings.

Percent-encode or decode URLs.

Decode and inspect JSON Web Tokens.

Pretty-print and format SQL queries.

Test regular expressions with live matches.

Explain cron and see next run times.

Convert Unix timestamps to dates.

Compare two texts side by side.

camelCase, snake_case, Title Case and more.

Count words, characters and reading time.

Generate placeholder text.

Binary, octal, decimal and hex.

Convert a time across time zones, with a world clock.

Length, mass, temperature, volume, speed and more.

Read text aloud with your browser voices.

Create strong random passwords.

Memorable multi-word passphrases.

Generate v4 UUIDs / GUIDs.

MD5, SHA-1 and SHA-256 hashes.

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.

Full-featured invoice builder — line items, tax, logo, PDF.

Quick service invoice in the browser — no sign-up, no upload.

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).

Decode a VIN’s manufacturer code (first 3 chars).

Search 2022 NAICS industry codes by keyword or number.

Search the GLEIF database by Legal Entity Identifier or name.

Decode a car diagnostic trouble code (P0420, P0300…).

Validate, convert and decode an ISBN-10 or ISBN-13.

Validate an ABA routing number and decode its Federal Reserve district.

Find the location and time zone of any North American area code.

Search Harmonized System (HS 2022) codes for traded goods.

Resolve a DOI to its title, authors and journal via CrossRef.

Decode a US National Drug Code and find its openFDA record.

See your public IP, location and network.

Visual grid builder with live CSS.

Build flex layouts with live preview.

IPv4 subnet, mask, range and host counts.

CIDR notation → range, mask, hosts.

Convert between mask, CIDR prefix and host count.

P/L, breakeven and ROI for calls and puts.

Price an option and see all its Greeks.

Grow savings with contributions over time.

Project a savings balance from monthly deposits.

See what a high-APY account grows to.

Maturity value of a certificate of deposit.

Convert between APR and effective APY.

Project a 401(k) with employer match.

Project tax-free Roth IRA growth.

See how inflation changes buying power.

Loan payment, total interest and payoff.

Your FI number and years to reach it.

Tip, total and split per person.