🔒 Runs in your browser — nothing is uploaded✓ Free, no signup
Free UUID Generator — Generate UUID v4 Online
Generate one or more unique, random UUIDs (GUIDs) instantly. Copy and use directly in your code, database, or API. No login, no install.
When should you use this UUID / GUID Generator?
- Generate unique identifiers for database records
- Create IDs for APIs, events, or distributed systems
- Use UUIDs in frontend or backend testing
- When you need collision-free IDs instantly
Example use case:
You’re designing a database schema or building an API that requires unique identifiers for each record. Use this tool to generate secure Version 4 UUIDs instantly and copy them directly into your code or database — no setup, no dependencies.
Tip: UUID v4 values are random and ideal for distributed systems where uniqueness across services is critical.
Explore More Developer Tools
Format, Validate, and Generate Data Instantly
TrueFormatter provides essential utilities for modern web development, including JSON formatting, YAML conversion, and more.
JSON Auto-Fixer & Formatter
Repair, validate, and beautify broken JSON (missing quotes, trailing commas).
JSON Validator & Linter
Check JSON syntax and see the exact line and column of every error.
JSON Beautifier
Pretty-print and indent JSON for easy reading and debugging.
JSON Compare & Diff Tool
Find the difference between two JSON objects visually and quickly.
JSONPath Tester
Evaluate JSONPath expressions with filters and recursive queries.
JSON Schema Generator
Generate a JSON Schema from any sample JSON document.
JSON to CSV Converter
Flatten nested JSON arrays into CSV for spreadsheets.
YAML ⇆ JSON Converter
Convert YAML to JSON or JSON to YAML instantly.
CSV to JSON Converter
Convert CSV or TSV data to a JSON array of objects, with type detection.
JSON to TypeScript
Generate TypeScript interfaces from any JSON sample.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) Header and Payload.
JWT Generator
Create and sign HS256/HS384/HS512 JSON Web Tokens for testing.
Hash Generator (MD5, SHA)
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
Password Generator
Generate strong, random passwords with the length and characters you choose.
Base64 Encoder ⇆ Decoder
Encode text to Base64 and decode Base64 to text for API debugging.
URL Encoder & Decoder
Cleanly encode special characters in URLs and decode query strings.
SQL Formatter & Beautifier
Format SQL queries for MySQL, PostgreSQL, SQL Server, SQLite and more.
CSS Minifier & Compressor
Optimize CSS by removing whitespace and comments to accelerate page load time.
JS Minifier & Compressor
Compress JavaScript to improve website speed and performance.
HTML Formatter & Beautifier
Beautify or minify HTML with clean, consistent indentation.
Markdown Editor & Preview
Write Markdown with a live preview and copy the HTML.
Word & Character Counter
Count words, characters, sentences and reading time as you type.
Case Converter
Convert text to camelCase, snake_case, kebab-case, Title Case and more.
Text Diff & Compare
Compare two texts and highlight every added and removed word or line.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words as text or HTML.
Fancy Text & Font Generator
Turn text into 𝐛𝐨𝐥𝐝, 𝘪𝘵𝘢𝘭𝘪𝘤, 𝓈𝒸𝓇𝒾𝓅𝓉 and other Unicode font styles you can paste anywhere.
Color Picker & Converter
Pick a color and convert between HEX, RGB and HSL instantly.
Color Palette Generator
Generate harmonious color palettes and export them as CSS, Tailwind or JSON.
CSS Gradient Generator
Build linear and radial CSS gradients visually and copy the code.
PX to REM Converter
Convert pixels to rem and rem to pixels for any root font size.
Regex Tester & Debugger
Test JavaScript regular expressions with live match highlighting and groups.
Cron Expression Generator
Build cron schedules, read them in plain English and preview next runs.
UUID / GUID Generator
Generate unique V4 UUIDs for database keys or testing.
Epoch converter online
Convert UNIX timestamps to human-readable dates and back instantly.
Time Zone Converter
Convert a time between time zones and compare cities side by side.
Random Number Generator
Generate random numbers in any range — unique, sorted or decimals.
Crop Image Online
Crop images exactly as selected with fixed aspect ratios. No upload, no resize, no quality loss.
Compress Image Online
Compress JPG, PNG & WebP images directly in your browser. No upload, no tracking, instant download.
Image Resizer
Resize images to exact pixels or a percentage, keeping the aspect ratio.
Image Converter (PNG, JPG, WebP)
Convert images between PNG, JPG and WebP in your browser.
Image to Base64
Convert an image to a Base64 data URI for CSS, HTML or JSON.
UUID / GUID Generator FAQ
UUIDs are used as unique identifiers for database records, public IDs, distributed systems, and client-generated keys.
It generates UUID Version 4 (V4), which is random and widely used for general-purpose unique identifiers.
UUID v4 collisions are extremely unlikely. For practical applications, they are considered safe for uniqueness.
Yes. UUIDs are better than sequential IDs for public URLs, but they are not authentication tokens.
If the generator is client-side, it can generate UUIDs offline inside your browser.
If it uses a cryptographically secure random source (like Web Crypto), it is suitable for most applications.