Free online generators for passwords, UUIDs, QR codes and more.

Turn plain English into a cron expression, or paste one to get a plain-English reading, a field-by-field breakdown and its next 5 run times.

Describe what you want to match in plain English and get a JavaScript regex, with a live tester and a token-by-token breakdown.

Convert a title into a URL slug as you type. Choose hyphen or underscore, case and a maximum length; accents become ASCII. One title per line for bulk.

Generate lorem ipsum placeholder text by paragraphs, sentences or words. Classic Latin or corporate, hipster and bacon variants. Copy or download as .txt.

Generate 1 to 50 random English words from a list of 7,776 common words. Filter by length (3 to 9 letters) and by first letter.

Decode a JWT to read its header and claims, verify its signature with a secret or public key, and sign new tokens with HS, RS, PS and ES algorithms.

Hash text or a file with MD5, SHA-1, SHA-256 or SHA-512, and compare it with an expected checksum. Create and check bcrypt password hashes.

Generate random API keys and secrets with an optional prefix such as sk_test_. Choose base64url, alphanumeric, base32 or hex, 8 to 96 characters, up to 100 keys.

Generate UUID v4, v7 or v1, one at a time or up to 1,000. Output as standard, uppercase, braces (GUID), no hyphens, URN or Base64, and decode any UUID you paste.

Paste JSON and get TypeScript interfaces, type aliases, a Zod schema or a Valibot schema. Updates as you type, in your browser.

Generate random integers or decimals between any two numbers, up to 10,000 at a time. Allow or forbid repeats, and add a seed for a repeatable sequence.

Generate up to 1,000 rows of fake test data as JSON, NDJSON, CSV or SQL INSERT. Pick the fields, set an optional seed, and copy or download.

Paste a list of names, then pick one or more winners at random, shuffle the whole list, or split it into teams. Every draw is unbiased.

Roll d4, d6, d8, d10, d12, d20, d100 or a custom die, up to 100 at once, with a modifier. Type dice notation such as 3d6+2 or 2d20kh1.

Flip a coin online for heads or tails, or flip up to 10,000 at once and see the counts, percentages, full sequence and longest streak.

Pick from 21 stack templates or describe your project in plain English. Get a labelled, deduplicated .gitignore to copy or download.

Pick MIT, Apache 2.0, GPL v3, BSD, ISC, MPL 2.0, Unlicense or CC0. Get the full LICENSE file to copy or download.

Build a robots.txt file with Allow and Disallow rules per crawler, sitemap lines and presets for blocking AI training bots. Copy or download it.

Type a vibe such as 'desert at dusk' or 'cyberpunk lab' and get a 5-color palette with hex, RGB, HSL and OKLCH for every swatch.

Build linear, radial and conic CSS gradients with 2 to 8 color stops. Drag the stops or type exact values, then copy the CSS or a Tailwind class.

Convert a color between HEX, RGB, HSL, OKLCH and CMYK. Paste any of those formats or a CSS color name, and see WCAG contrast against white and black.

Build CSS box shadows with sliders for offset, blur, spread, color and opacity. Stack up to 6 layers, preview live, copy as CSS or Tailwind.

Build a frosted-glass card with sliders for blur, opacity, saturation, border and radius. Preview it over five backdrops and copy the CSS or Tailwind.

Pick one of 12 CSS keyframe animations, set duration, delay, easing, iterations and direction, preview it, and copy the @keyframes CSS or a Tailwind class.

Make an initials, identicon or geometric avatar from a name or email. The same input always gives the same avatar. Download SVG or a 512 px PNG.

Generate strong random passwords or passphrases from the EFF wordlist. Set the length and character types, see the entropy, and make up to 100 at once.

Generate random 4, 6 or 8-digit PINs. Optional filters leave out obvious patterns like 1234 and 0000, and PINs that read as dates or years.

Get 10 usernames: random adjective-noun pairs made in your browser, or AI suggestions from a vibe like 'cyberpunk hacker, short'. Set a maximum length.

Realistic-looking test email addresses for demos, fixtures and form testing, up to 50 per run. They are not working inboxes and cannot receive mail.

Random first, last or full names for test data. Filter by origin (8 lists, from English to Japanese) and gender; generate 1, 10, 25 or 100.

Random postal addresses for test forms and demos, in the local format for the US, UK, Germany, France, Canada, Australia and Japan.

Test phone numbers from ranges reserved for fiction: 555-01XX, 07700 900XXX and more. US, Canada, UK, Australia, France; E.164 or local format.

Stripe's published test card numbers in one filterable list: successful payments by brand, declines by reason, and 3D Secure. They work in test mode only.

Make a QR code for a URL, text, a WiFi network or a vCard contact. Download as SVG or PNG up to 2,048 px. Codes are static, with no redirect or expiry.

Make a favicon from text, an emoji or an image. Get a zip with favicon.ico, six PNG sizes from 16 to 512 px, site.webmanifest and the HTML link tags.

Make a placeholder image at any size from 16 to 4,096 px. Set the background, text color and label, then download SVG or PNG or copy a data: URL.

Make Code 128, EAN-13, UPC-A, EAN-8 and Code 39 barcodes in your browser. Check digits are calculated and verified. Download as SVG or PNG.

Generate the SEO, Open Graph and Twitter Card meta tags for a page, with a link preview. An AI model can suggest the title and description from a brief.

Add utm_source, utm_medium, utm_campaign and other UTM parameters to a URL. The tool keeps existing parameters and #fragments and encodes values.