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Code Generators & Builders
Generate code, classes, types, regex, configs, schema, boilerplate and mock data. 85 free tools that run in your browser, no sign-up needed.
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QR Code GeneratorMake QR codes for links, Wi-Fi, email and more.Barcode GeneratorCreate Code 128, EAN-13, UPC-A, EAN-8, Code 39 and ITF-14 barcodes as PNG or SVG.UUID GeneratorGenerate UUID v4 and v7 / GUIDs in bulk and copy or download them.Schema Markup Generator (JSON-LD)Create JSON-LD structured data for FAQ, Product, Article and more.Htaccess & Nginx Redirect GeneratorBuild 301 redirects for .htaccess, Nginx and Netlify or Cloudflare _redirects.Fake Data GeneratorGenerate mock data as JSON, CSV or SQL.Random String GeneratorGenerate secure random strings and tokens in bulk with any length and character set.API Key GeneratorCreate secure API keys and secrets with prefixes, checksums and SHA-256 hashes for storage.MIME Type LookupFind the MIME type for any file extension, or the extensions for a MIME type, in 400+ entries.Cron Expression GeneratorBuild crontab schedules visually, read them in plain English and see the next run times.URL Slug GeneratorTurn titles into clean, SEO-friendly URL slugs: accents, stop words, separators and bulk lines.JSON Schema GeneratorTurn sample JSON into a draft 2020-12 JSON Schema with types, required fields and formats.Gitignore GeneratorBuild a .gitignore from 50+ templates for languages, frameworks, IDEs and OS, merged and deduped.License GeneratorCreate a LICENSE file for MIT, Apache, GPL, BSD, ISC, MPL or Unlicense with your name and year.ULID GeneratorGenerate sortable ULIDs and UUID v7 in bulk, monotonic option, and decode their timestamps.Htpasswd GeneratorCreate .htpasswd entries with bcrypt, APR1-MD5 or SHA-1 for Apache and Nginx basic auth.Placeholder Image GeneratorCreate placeholder images in any size, color and text as PNG, JPG, WebP, SVG or data URI.Ads.txt GeneratorCreate or validate ads.txt and app-ads.txt files: seller lines, cert IDs and variables.Docker Run to Compose ConverterConvert docker run commands to docker-compose.yml, or a compose file back to docker run.Dockerfile GeneratorGenerate a production Dockerfile and .dockerignore for Node, Python, Go or a static nginx site.HTML Boilerplate GeneratorTick the options you need and get a clean HTML5 starter template with meta, OG tags and CSS reset.JSON to Zod SchemaInfer a Zod (or Yup) schema from sample JSON with optional, nullable and z.infer types.Linux Commands Cheat SheetSearchable Linux and bash command reference with flags explained, examples and copy buttons.LLMs.txt GeneratorBuild an llms.txt file for AI crawlers: summary and link sections, import from your sitemap.Nano ID GeneratorGenerate secure Nano IDs with custom alphabet, length and count, plus a collision calculator.Nginx Config GeneratorBuild an nginx server block: static site, SPA, reverse proxy or PHP, with SSL, gzip and redirects.OpenAPI / Swagger ViewerView OpenAPI 2/3 JSON or YAML as interactive API docs with validation and an endpoint list.package.json GeneratorFill a form and get a valid, npm-ready package.json with scripts, dependencies and checks.PKCE Code Challenge GeneratorGenerate an OAuth 2.0 PKCE code_verifier and S256 code_challenge, build auth URLs, verify pairs.README GeneratorFill in a form and get a polished README.md with badges, install, usage and license, live preview.Regex GeneratorBuild regular expressions visually from blocks or presets (email, date, phone) and test them live.Commit Message GeneratorBuild Conventional Commit messages with type, scope, body, breaking change and issue refs.Database Schema DesignerDesign tables and relationships visually, then export SQL for MySQL, PostgreSQL or SQLite.Docker Compose GeneratorBuild a docker-compose.yml with a form: services, ports, volumes, env, healthchecks and presets.Dummy File GeneratorCreate test files of an exact size in KB, MB or GB with zeros, random bytes or text.FFmpeg Command GeneratorPick a task and options, get the exact ffmpeg command with every flag explained.Folder Tree GeneratorTurn a local folder or an indented list into an ASCII directory tree for your README.GitHub Actions Workflow GeneratorBuild a GitHub Actions CI workflow: triggers, matrix, caching, tests, Pages or Docker deploy.Kubernetes YAML GeneratorGenerate Deployment, Service, Ingress, ConfigMap, Secret and HPA manifests with safe defaults.Markdown TOC GeneratorGenerate a linked table of contents from Markdown headings with GitHub-style anchors.OpenAPI EditorEdit OpenAPI/Swagger YAML or JSON side by side with live API docs, validation and download.OpenAPI ValidatorValidate OpenAPI 3.0/3.1 and Swagger 2.0 specs: schema errors, broken $refs, line numbers.Pivot Table MakerBuild pivot tables from CSV or Excel by drag and drop: sum, count, average, charts, export.SQL Query BuilderBuild SELECT queries visually: joins, filters, GROUP BY, ORDER BY and LIMIT, as clean SQL.Truth Table GeneratorType a logic expression and get its full truth table, minterms and canonical DNF/CNF.TypeScript PlaygroundWrite TypeScript with live type checking, see the compiled JavaScript and run it in your browser.Article Schema GeneratorCreate Article, BlogPosting or NewsArticle JSON-LD with headline, authors, dates and images.Event Schema GeneratorCreate Event JSON-LD with dates, venue or online location, tickets, organizer and performers.Google Search Query BuilderBuild advanced Google searches with site:, filetype:, intitle:, exact phrases and date operators.HowTo Schema GeneratorCreate HowTo JSON-LD with steps, tools, supplies, total time and cost, then copy it.Htaccess GeneratorBuild an Apache .htaccess file: HTTPS, www, gzip, caching, error pages, IP blocks, hotlinks.HTML Email Template BuilderDrag and drop blocks to build a responsive, table-based HTML email with inline styles.Organization Schema GeneratorCreate Organization JSON-LD with logo, URL, contact points, address and social profiles.PIN GeneratorGenerate random 4, 6 or 8-digit PINs that avoid sequences, repeats, dates and common PINs.Product Schema GeneratorBuild Product JSON-LD with price, availability, brand, GTIN, ratings and reviews.Question Keyword GeneratorFind the questions people ask about a topic, grouped by who, what, why, how, can and more.Recipe Schema GeneratorCreate Recipe JSON-LD with ingredients, steps, prep and cook times, nutrition and ratings.Security Headers GeneratorPick HSTS, CSP, frame, referrer and permissions options and get Apache, Nginx, Netlify or Cloudflare config.SKU GeneratorBuild consistent SKUs from brand, category, size and color, then export every variant as CSV.Typography Scale GeneratorBuild a modular type scale from a base size and ratio, then copy CSS variables or a Tailwind config.WordPress Salt GeneratorGenerate fresh WordPress security keys and salts for wp-config.php, .env or Docker in one click.ANSI Color Code GeneratorStyle terminal text with 16, 256 or RGB colors and get escape codes for bash, Python, JS and C.Apache Virtual Host GeneratorCreate an Apache VirtualHost config with SSL, redirects, reverse proxy or PHP-FPM in seconds.Bash Prompt GeneratorDrag and drop a custom PS1 prompt for bash or zsh with colors, git branch and a live preview.Changelog GeneratorTurn Conventional Commit messages into a grouped Keep a Changelog Markdown file per version.cURL Command BuilderBuild curl commands from a form: method, headers, query, JSON or form body, auth and flags.Docker Compose to KubernetesConvert docker-compose.yml into Kubernetes Deployment, Service, ConfigMap and PVC manifests.Docker Compose ValidatorCheck a docker-compose.yml for YAML errors, schema mistakes, broken references and deprecated keys.Dockerfile LinterLint a Dockerfile for best practices: pinned tags, apt cleanup, non-root USER and layer count.Dockerignore GeneratorBuild a .dockerignore from Node, Python, Go and Java templates, plus your own entries.ESLint Config GeneratorGenerate a flat eslint.config.js for JavaScript, TypeScript, React or Node with rule presets.Git Branch Name GeneratorTurn a ticket ID and title into a clean, valid git branch name like feature/PROJ-12-add-login.GitLab CI Config GeneratorGenerate a .gitlab-ci.yml with stages, jobs, images, cache, artifacts and rules from templates.Jinja2 Template TesterRender Jinja2 templates with YAML or JSON variables using real Jinja2, with clear error lines.JSON Schema Mock Data GeneratorGenerate realistic sample JSON from a JSON Schema: formats, patterns, $ref, seeds and counts.Kubernetes Secret GeneratorCreate Kubernetes Secret YAML from key/value pairs or .env with auto base64, or decode one.Kubernetes YAML ValidatorValidate Kubernetes manifests against the API schema of a chosen version, with error paths.Prettier Config GeneratorToggle Prettier options, preview formatted code live and copy your .prettierrc file.Quartz Cron GeneratorBuild and explain Quartz and Spring cron expressions with seconds, ?, L, W and #, plus next fire times.README Badge GeneratorCreate Shields.io-style README badges for license, version, build and custom labels.Systemd Service File GeneratorCreate a systemd .service unit with ExecStart, user, restart policy, environment and hardening.tsconfig.json GeneratorBuild a tsconfig.json with target, module, strict checks and path aliases, each option explained.Access Log AnalyzerAnalyze Apache and Nginx access logs: top URLs, IPs, status codes, bots and traffic charts.Regex String GeneratorGenerate random test strings that match any regular expression, checked against the real regex.ASCII Table GeneratorTurn CSV or pasted cells into plain-text tables: MySQL, Markdown, Unicode box and reST styles.
About Code Generators & Builders
Generate QR codes, barcodes, UUIDs, schema markup, redirects, mock data and other boilerplate. Set the options and copy the result into your project.
Most used here: QR Code Generator, Barcode Generator and UUID Generator.