← trysandbox.ioAll 152 tools
Browse all 152 free browser-based generators: QR codes, barcodes, passwords, CSS, JSON, SEO and developer tools.
Generators
- QR Code GeneratorTurn any text or URL into a scannable square.
- WiFi QR CodeShare your WiFi instantly — scan to connect.
- Barcode GeneratorCODE128, EAN, UPC, ITF and more.
- Random PickerNumbers, dice, coin flips and list shuffler.
- Username GeneratorRandom handles in snake, kebab or PascalCase.
- Business NameBrand and startup name ideas with domain checks.
- Placeholder ImageCustom-sized placeholder images for mockups.
- Fake User ProfileSynthetic users with name, email, address and avatar.
- Favicon GeneratorEmoji or letter favicon as inline SVG · all sizes.
- Mock JSON DataGenerate arrays of fake records from a tiny schema.
- HTML Table BuilderGenerate an HTML table with rows, columns and styling.
- Fake AddressRealistic mock addresses from US, UK, DE, FR, JP, CA.
- Fake NameRandom full names with titles and initials — pick gender.
- Invoice GeneratorBuild a printable invoice with line items, tax and totals.
- Test Credit CardLuhn-valid Visa, Mastercard, Amex and Discover — for testing.
- MAC / IP AddressRandom MAC addresses and IPv4 / IPv6 in bulk.
- User-Agent StringsRealistic browser UA strings for Chrome, Firefox, Safari, Edge.
- Tagline / SloganPunchy taglines and slogans built around your brand name.
- Team NameCool two-word team names for squads, projects and clans.
- Email SignatureHTML email signature with live preview and accent color.
- Random QuoteInspirational and dev-culture quotes on tap.
- Dev Dad JokeProgramming puns and dad jokes for standups.
- Fantasy Character NameElf, dwarf, orc, human and dragon character names.
- Pet NameNames for dogs, cats, birds, rabbits, fish and reptiles.
- Band NamePunchy two-word band names across every genre.
- Haiku GeneratorRandom 5-7-5 haiku poems with a dev twist.
- Writing PromptStory prompts to break writer's block instantly.
- Dice RollerRoll RPG dice with notation like 2d6+3, 1d20, 4d8-1.
- Bingo CardPrintable classic 5×5 bingo card with free-space star.
- Coupon CodeBulk discount codes with prefix, length and count.
- Random GPS CoordinatesRandom lat/lng points by region with map links.
- Recipe IdeaDinner ideas — method, protein, sauce and side.
- UTM Link BuilderBuild campaign tracking URLs with source, medium, campaign, term and content.
- vCard (.vcf) GeneratorDownloadable contact card with phone, email, company and address.
- Calendar Event (.ics)Downloadable calendar invite for Google, Outlook and Apple Calendar.
- WhatsApp Link Generatorwa.me click-to-chat links with a pre-filled message and HTML button.
Security
- Password GeneratorCryptographically strong random passwords.
- PIN Code GeneratorNumeric PINs with optional no-repeat rule.
- API Key GeneratorPrefixed secret keys in base64, hex or UUID format.
- PHP password_hashBcrypt hashes compatible with PHP's password_hash() and password_verify().
- Hash GeneratorMD5, SHA-1, SHA-256 and SHA-512 hashes.
- Card / Luhn ValidatorValidate credit-card numbers and detect brand.
- Mnemonic PhraseRandom word-based passphrases (4–24 words).
- TOTP 2FA SecretAuthenticator secret with QR code and otpauth URL.
- Security HTTP HeadersHSTS, CSP, X-Frame-Options + more · nginx, apache, node.
- JWT GeneratorSign HS256/384/512 JSON Web Tokens with your own claims and secret.
- JWT ValidatorVerify a JWT signature against your HMAC secret and check expiry.
- JWT Expiration CalculatorRead iat, nbf and exp claims with a live countdown.
- PEM / SSL Certificate DecoderDecode PEM certificates and keys — subject, validity and algorithms.
- RSA Key GeneratorGenerate RSA key pairs in PEM format, 2048 to 4096 bits.
- SSH Key GeneratorGenerate an OpenSSH ssh-rsa public key and PKCS#8 private key.
- .htpasswd GeneratorApache basic-auth user line with a bcrypt password hash.
- Caesar / ROT13 CipherShift-cipher any text with a live encoded and decoded view.
Developer
- JWT DecoderDecode and inspect JSON Web Tokens.
- UUID GeneratorGenerate v4 UUIDs / GUIDs in bulk.
- Base64 EncoderEncode and decode Base64 strings, UTF-8 safe.
- Image to Base64Convert any image to a data: URI.
- JSON FormatterPretty-print, validate and minify JSON.
- CSV ↔ JSONConvert between CSV and JSON in both directions.
- URL EncoderPercent-encode and decode URL components.
- Unix TimestampConvert between Unix time and human dates.
- Age / Date DiffCalculate age and difference between two dates.
- Regex TesterLive-test regular expressions with groups.
- Cron ExpressionBuild and explain cron schedules in plain English.
- Number BaseBinary, octal, decimal and hexadecimal converter.
- Text DiffCompare two texts line by line.
- HTML EscapeEscape and unescape HTML entities.
- SEO Meta TagsGenerate Open Graph, Twitter and SEO meta tags.
- robots.txtBuild a robots.txt with disallow rules and sitemap.
- .htaccess BuilderApache rules: HTTPS, www, gzip, cache, SPA fallback.
- JSON → SQL INSERTTurn JSON rows into safe parameterized INSERT statements.
- .gitignore BuilderCombine .gitignore templates for any stack or OS.
- License FileGenerate MIT, Apache, GPL, ISC and Unlicense files.
- README GeneratorBuild a polished README.md with badges and sections.
- Shields.io BadgeGenerate shields.io badges with markdown and HTML output.
- .env.exampleStrip secrets from a .env file to publish a safe template.
- Conventional CommitBuild commit messages following the Conventional Commits spec.
- Sitemap.xmlBuild a sitemap.xml from a base URL and path list.
- ULID GeneratorTime-sortable 26-character identifiers (Crockford Base32).
- NanoID GeneratorShort URL-safe IDs with custom alphabet and length.
- Dockerfile GeneratorProduction-ready Dockerfiles for Node, Python, PHP, Go, Rust…
- .editorconfigCross-editor formatting config with sensible defaults.
- JSON → CREATE TABLEInfer a SQL schema from sample JSON · Postgres, MySQL, SQLite.
- JSON → TypeScriptGenerate TypeScript interfaces from a JSON sample.
- YAML ↔ JSONConvert between YAML and JSON in both directions.
- cURL → fetch()Turn a curl command into a JavaScript fetch() call.
- chmod CalculatorLinux permission bits · octal and symbolic side by side.
- package.json BuilderScaffold a package.json with name, scripts and metadata.
- HTML PreviewLive HTML sandbox — edit and preview instantly.
- SQL FormatterBeautify and uppercase SQL queries with keyword-aware indentation.
- Nginx ConfigReverse-proxy nginx server block with HTTPS redirect and gzip.
- docker-compose.ymlCompose file for postgres, mysql, mongo, redis, rabbitmq, elastic.
- GitHub Actions CICI workflow for Node, Bun, Python, Go or Rust.
- MakefileStandard Makefile with install, dev, build, test, docker targets.
- Kubernetes ManifestDeployment + Service YAML with probes and resource limits.
- IP Subnet CalculatorCIDR to network, broadcast, mask, host range and count.
- systemd ServiceLinux systemd unit file with install commands.
- .prettierrcPrettier config with tabs, quotes, print width and trailing comma.
- JSON ValidatorValidate JSON with line and column error reporting plus structure stats.
- XML Formatter / Pretty PrinterPretty-print or minify XML with indentation.
- XML ValidatorCheck XML is well-formed and inspect root, element count and depth.
- XML ↔ JSONConvert XML to JSON and JSON back to XML, attributes included.
- TOML ↔ JSONConvert TOML config to JSON and back, tables and arrays supported.
- XML Sitemap ValidatorValidate sitemap.xml against the sitemaps.org protocol rules.
- SQL MinifierStrip comments and whitespace to shrink SQL queries.
- SQL → JSONTurn INSERT statements into JSON rows for seeds and fixtures.
- UUID ValidatorValidate UUIDs and detect version, variant and embedded timestamps.
- ULID DecoderDecode a ULID into its timestamp and randomness parts.
- CSV → Markdown TableTurn CSV rows into a Markdown table with column alignment.
- CHANGELOG GeneratorKeep-a-Changelog release notes with Added, Changed, Fixed and Removed.
- JSON → GraphQL SchemaInfer GraphQL types from a JSON object, nested objects included.
Design
- Color PaletteHarmonious palettes from a single seed color.
- CSS GradientBuild and copy beautiful CSS gradients.
- Color ConverterHEX ↔ RGB ↔ HSL with a live picker.
- CSS Box ShadowVisual box-shadow builder with live preview.
- SVG BlobRandom organic SVG blobs for backgrounds and headers.
- CSS Clip-PathPolygon, circle and custom CSS clip-path shapes.
- Fancy Border RadiusAsymmetric organic border-radius with live preview.
- CSS AnimationKeyframe animations with live preview · fade, slide, spin…
- CSS TrianglePure-CSS triangle shapes in 8 directions.
- Loading Spinner CSSRing, dots, bars and pulse spinners with copyable CSS.
- Color Shades & Tints11-stop tints and shades + Tailwind config from one color.
- CSS Pattern BackgroundStripes, dots, checkers, grid and crosshatch backgrounds.
- CSS Grid GeneratorVisual CSS Grid playground with copyable code.
- CSS FlexboxInteractive flexbox playground · direction, justify, align…
- Tailwind BuilderClick Tailwind classes to build a styled element with live preview.
- CSS Wave GeneratorAnimated-looking SVG wave dividers between website sections.
- Section Shape DividerTilt, curve, zigzag and mountain dividers between sliders and sections.
- Glassmorphism CSSFrosted glass cards with backdrop blur.
- Mesh GradientMulti-blob radial mesh gradient backgrounds.
- Gradient Text CSSBackground-clip gradient headlines.
- Neumorphism CSSSoft UI raised and pressed shadows.
- Custom Scrollbar CSSStyle webkit and Firefox scrollbars.
- CSS Image FiltersBlur, contrast, sepia, hue-rotate and more on a live image.
- CSS Button GeneratorSolid, gradient, outline, glow and 3D buttons with hover states.
- Text Shadow / NeonNeon, retro 3D, emboss and outline text effects.
- Aurora BackgroundAnimated aurora blur background for hero sections.
- Tailwind Theme ConfigTheme config for Tailwind v4 CSS or v3 tailwind.config.js.
- CSS Tooltip GeneratorPure-CSS hover tooltips in any position with live preview.