Generator calculators
139 browser-based generator calculators and utilities. Every formula runs locally - no upload, no sign-up, no tracking of the numbers you type.
All generator tools
57 tools, each runs locally in your browser. Click any card to open it.
Barcode Generator computes rendered barcode (SVG/PNG) from string to encode, symbology. Runs entirely in your browser.…
Bcrypt Password Hash Generator takes token quantity, price, fees, holding period and returns the matching bcrypt passw…
Bold Text Generator takes source text, target style, optional rules and returns the matching bold text generator resul…
Book Title Generator takes source text, target style, optional rules and returns the matching book title generator res…
Bubble Text Generator takes source text, target style, optional rules and returns the matching bubble text generator r…
Character Name Generator takes format and optional constraints and returns the matching character name generator resul…
A Cover Letter Generator produces a cover letter on demand, using a deterministic algorithm or a cryptographically str…
Cron Expression Generator takes string, regex, format, count and returns the matching cron expression generator result…
CSS Gradient Generator takes string, regex, format, count and returns the matching css gradient generator result. Runs…
Essay Title Generator takes source text, target style, optional rules and returns the matching essay title generator r…
Fortune Cookie Generator takes format and optional constraints and returns the matching fortune cookie generator resul…
Hash Generator takes token quantity, price, fees, holding period and returns the matching hash generator result. Runs …
HTTP Basic Auth Header Generator takes token quantity, price, fees, holding period and returns the matching http basic…
Invisible Character Generator takes source text, target style, optional rules and returns the matching invisible chara…
Lenny Face Generator takes source text, target style, optional rules and returns the matching lenny face generator res…
Lorem Ipsum Generator takes format and optional constraints and returns the matching lorem ipsum generator result. Run…
Paper Generator takes format and optional constraints and returns the matching paper generator result. Runs entirely i…
Password Generator takes format and optional constraints and returns the matching password generator result. Runs enti…
Poem Title Generator takes source text, target style, optional rules and returns the matching poem title generator res…
Pokemon Name Generator takes format and optional constraints and returns the matching pokemon name generator result. R…
Random Address Generator takes format and optional constraints and returns the matching random address generator resul…
Random Adjective Generator takes format and optional constraints and returns the matching random adjective generator r…
Random Color Generator takes format and optional constraints and returns the matching random color generator result. R…
random flag generator, random country flag, flag picker random country flag generator - free, browser-only, no signup …
random country, random country picker, random nation, pick a country, world country generator random country generator…
Random Date Generator takes format and optional constraints and returns the matching random date generator result. Run…
Random Emoji Generator takes format and optional constraints and returns the matching random emoji generator result. R…
Random IP Address Generator takes format and optional constraints and returns the matching random ip address generator…
Random Last Name Generator takes format and optional constraints and returns the matching random last name generator r…
Random Letter Generator takes format and optional constraints and returns the matching random letter generator result.…
Random MAC Address Generator takes format and optional constraints and returns the matching random mac address generat…
Random Month Generator takes format and optional constraints and returns the matching random month generator result. R…
random movie, what to watch, movie picker, random film generator, cant decide what to watch random movie generator fre…
Random Name Picker takes format and optional constraints and returns the matching random name picker result. Runs enti…
Random Noun Generator takes format and optional constraints and returns the matching random noun generator result. Run…
Random Number Generator takes format and optional constraints and returns the matching random number generator result.…
Random Password Generator takes format and optional constraints and returns the matching random password generator res…
Random Port Number Generator takes format and optional constraints and returns the matching random port number generat…
Random String Generator takes format and optional constraints and returns the matching random string generator result.…
Random Token Generator takes token quantity, price, fees, holding period and returns the matching random token generat…
random state, random us state, pick a state, us state generator random us state generator free random us state picker.
Random Verb Generator takes format and optional constraints and returns the matching random verb generator result. Run…
Random Word Generator takes format and optional constraints and returns the matching random word generator result. Run…
Random Year Generator takes format and optional constraints and returns the matching random year generator result. Run…
RSA Key Pair Generator takes token quantity, price, fees, holding period and returns the matching rsa key pair generat…
Schema Markup Generator is a free seo calculator that gives you a deterministic answer for schema markup generator que…
small caps, small caps generator, unicode small caps, tiny caps text, small capitals small caps generator free small c…
strikethrough text, cross out text, underline text generator, unicode strikethrough, wavy text strikethrough text gene…
Superscript & Subscript Generator takes source text, target style, optional rules and returns the matching superscript…
Text Hash Generator (MD5, SHA-1, SHA-256, SHA-384, SHA-512) takes token quantity, price, fees, holding period and retu…
URL Slug Generator takes string, regex, format, count and returns the matching url slug generator result. Runs entirel…
UUID Generator takes string, regex, format, count and returns the matching uuid generator result. Runs entirely in you…
Yes or No Generator takes format and optional constraints and returns the matching yes or no generator result. Runs en…
YouTube Title Generator takes source text, target style, optional rules and returns the matching youtube title generat…
🎨 Color Palette Generator takes format and optional constraints and returns the matching 🎨 color palette generator r…
Generate any number of random English example sentences from a built-in corpus. Useful for mockups, typing tests, and …
Generate cryptographically strong passwords (length 8 to 64). Choose character sets, exclude ambiguous characters, see…
About generator
Generator tools produce useful random or structured output for development, design, and content workflows: random password and passphrase, UUID v4, Lorem Ipsum (words / sentences / paragraphs / lists), random user data for testing (name, email, address, phone), random number within a range, random color palette, mock JSON data, random sentence for typing tests, and dice / coin / card draws.
Use these to seed a development database with realistic test users, generate Lorem Ipsum for a design comp, produce a UUID for a database row, fill a Figma design with placeholder content, generate a color palette around a base hue, or roll random dice for tabletop sessions.
Sources: Lipsum classical text for Lorem Ipsum, Faker.js conventions for random user data, RFC 4122 for UUID v4. Everything generated client-side; no telemetry on the outputs.
Common use cases
Real scenarios where the generator calculators in this category earn their keep.
Seed test database
Generate 100 realistic users (name, email, address, phone, DOB) for dev/staging. CSV or JSON output.
UUID for a new record
Random RFC 4122 v4 UUID. Useful when you need a unique identifier outside of an auto-incrementing database column.
Lorem Ipsum for design mocks
Generate the classical Lorem text in any quantity (words / paragraphs / lists). Toggle to start with 'Lorem ipsum dolor sit amet' (classical) or random words.
Random color palette
Pick a base HSL color. Generator outputs a 5- or 7-color palette using complementary, analogous, triadic, or split-complementary harmony rules.
Random number in range
Crypto-random integer between min and max (inclusive). Use Web Crypto, not Math.random, for unbiased output.
Key terms
Glossary for the formulas and conventions these tools use.
- UUID v4
- Randomly-generated Universally Unique Identifier. 128 bits, 36-char string with hyphens. Collision probability ~10⁻³⁷ for 1 billion UUIDs.
- Lorem Ipsum
- Latin-like placeholder text derived from Cicero's De Finibus Bonorum et Malorum. Used since the 1500s to fill design layouts without distracting from form.
- Color harmony
- Rules for combining colors. Complementary (opposite on color wheel), analogous (adjacent), triadic (equally spaced 3), split-complementary (1 + 2 around the complement).
- Faker
- Library convention for generating realistic random data (names, emails, addresses). The generator tools follow Faker conventions for compatibility.
- Random number bias
- Math.random has subtle biases at the bit level. crypto.getRandomValues is unbiased and the right primitive for security-relevant randomness.
- Passphrase (Diceware)
- Random words from a list (typically 6-8 words), more memorable than a comparable-entropy random password. 6 Diceware words = 77 bits of entropy.
- Mock JSON
- Structured JSON payload with realistic types (string, number, boolean, nested object, array) for API client testing.
Frequently asked questions
Short answers to the most common generator questions.