Search 190+ browser-based developer tools by name, description or category. Everything runs locally.
Showing 190 tools
Build CSS box shadows.
Color & CSS
Convert text between camel, snake, kebab, Pascal, constant and title case.
Text & Strings
Convert colors between HEX, RGB, HSL, HWB, LCH and OKLCH.
Color & CSS
Parse and generate cron expressions.
Time & Date
Build linear, radial and conic CSS gradients.
Color & CSS
Compress JPEG, PNG and WebP images.
Images & Media
Convert between JSON and CSV.
Data Format Conversion
Convert between JSON and XML.
Data Format Conversion
Convert between JSON and YAML.
Data Format Conversion
Generate TypeScript interfaces from JSON.
Data Format Conversion
Generate an MD5 hash in your browser.
Hashing & Cryptography
Generate compact, URL-safe NanoIDs.
Generators
Convert numbers between binary, octal, decimal and hex.
Number, Math & Units
Generate strong passwords with custom rules.
Generators
Generate QR codes for URLs, text and contact details.
Images & Media
Test regular expressions and inspect match groups.
Text & Strings
Generate SHA-1, SHA-256, SHA-384 or SHA-512 hashes.
Hashing & Cryptography
Convert SVG files to PNG.
Images & Media
Compare two texts side by side.
Text & Strings
Generate sortable ULIDs.
Generators
Convert Unix timestamps and ISO 8601 dates.
Time & Date
Generate UUID v1, v4 and v7 values.
Generators
Check WCAG contrast ratios.
Color & CSS
Beautify and indent CSS stylesheets.
CSS
Compress CSS by removing whitespace and comments.
CSS
Check CSS for syntax errors.
CSS
Beautify and indent HTML documents.
HTML
Remove whitespace and unnecessary characters from HTML.
HTML
Check HTML for syntax and structure errors.
HTML
Beautify and indent JavaScript code.
JavaScript
Compress JavaScript with Terser.
JavaScript
Check JavaScript for syntax errors.
JavaScript
Beautify and indent JSON.
JSON
Compress JSON by removing whitespace.
JSON
Validate JSON and report syntax errors.
JSON
Generate .gitignore files.
Web & Network
Generate .htaccess rules.
Web & Network
Encrypt and decrypt text with AES-GCM.
Hashing & Cryptography
Generate API keys and secrets.
Generators
Render text as ASCII art.
Text & Strings
Generate ASCII tables.
Git, Docs & Productivity
Calculate aspect ratios and dimensions.
Number, Math & Units
Generate Code128 and EAN-13 barcodes.
Images & Media
Encode and decode Base32 strings.
Encoding & Decoding
Encode and decode Base64 strings.
Encoding & Decoding
Turn a file into a Base64 data URI.
Encoding & Decoding
Build HTTP Basic authorization headers.
Auth & Tokens
Generate and verify bcrypt password hashes.
Hashing & Cryptography
Calculate with arbitrary-precision BigInt values.
Number, Math & Units
Convert between binary and text.
Encoding & Decoding
Evaluate bitwise operations.
Number, Math & Units
Build CSS border radii.
Color & CSS
Count business days between dates.
Time & Date
Inspect the fields of a PEM certificate.
Hashing & Cryptography
Build CSS clip-path shapes.
Color & CSS
Render code as a shareable image.
Code Formatting & Transformation
Highlight code and emit HTML.
Code Formatting & Transformation
Preview colors with color vision deficiencies.
Color & CSS
Generate a color palette from a base color.
Color & CSS
Build Conventional Commit messages.
Git, Docs & Productivity
Parse and build cookie strings.
Auth & Tokens
Calculate a CRC32 checksum.
Hashing & Cryptography
Validate card numbers with the Luhn algorithm.
Validators
Explain cron expressions in plain English.
Time & Date
Validate cron expressions.
Validators
Generate CSS Grid layouts.
Color & CSS
Build CSS keyframe animations.
Color & CSS
Convert CSS declarations into Tailwind utility classes.
CSS
Format and validate CSV data.
Data Format Conversion
Convert CSV rows into JSON.
Data Format Conversion
Preview and tune cubic-bezier easing.
Color & CSS
Convert between curl commands and fetch calls.
Code Formatting & Transformation
Format currencies with Intl.NumberFormat.
Git, Docs & Productivity
Convert between bytes, KB, MB and GiB.
Number, Math & Units
Calculate the difference between dates.
Time & Date
Generate memorable Diceware passphrases.
Generators
Generate a directory tree from paths.
Git, Docs & Productivity
Convert docker run commands to docker-compose.
Web & Network
Format milliseconds as human-readable durations.
Time & Date
Validate email addresses.
Validators
Search and copy emojis.
Git, Docs & Productivity
View and remove image metadata.
Images & Media
Generate fake names, emails, addresses and dates.
Generators
Generate favicon PNGs from an image.
Images & Media
Hash a file without uploading it.
Hashing & Cryptography
Find and replace text using regular expressions.
Text & Strings
Experiment with CSS Flexbox.
Color & CSS
Build frosted-glass CSS effects.
Color & CSS
Plot mathematical functions.
Number, Math & Units
Format GraphQL schemas and queries.
Code Formatting & Transformation
View text as a hex dump.
Number, Math & Units
Encode and decode hexadecimal strings.
Encoding & Decoding
Generate HMAC signatures with a secret key.
Hashing & Cryptography
Encode and decode HTML entities.
HTML
Preview rendered HTML in a sandboxed frame.
HTML
Convert HTML markup to JSX.
Code Formatting & Transformation
Look up HTTP status codes.
Web & Network
Validate IBAN numbers.
Validators
Inspect IEEE 754 floating-point values.
Number, Math & Units
Extract a color palette from an image.
Images & Media
Convert images between PNG, JPEG, WebP and AVIF.
Images & Media
Resize and crop images.
Images & Media
Sort JavaScript and TypeScript imports.
Code Formatting & Transformation
Validate IPv4 and IPv6 addresses.
Validators
Parse IP addresses and CIDR ranges.
Web & Network
Validate ISBN-10 and ISBN-13 numbers.
Validators
Convert a JavaScript object literal to JSON.
JavaScript
Compare two JSON documents.
Data Format Conversion
Validate JSON against a JSON Schema.
Data Format Conversion
Generate Go, Java, Python or Pydantic types from JSON.
Data Format Conversion
Convert JSON into a JavaScript object literal.
JavaScript
Generate Zod schemas from JSON.
Data Format Conversion
Explore JSON as a collapsible tree.
JSON
Evaluate JSONPath expressions against JSON.
Data Format Conversion
Create and sign JWTs with HS256 or HS512.
Auth & Tokens
Decode JWT headers, claims and expiry.
Auth & Tokens
Compile LESS to CSS.
Code Formatting & Transformation
Generate MIT, Apache 2.0 or GPL licenses.
Git, Docs & Productivity
Convert between CRLF and LF line endings.
Text & Strings
Filter and inspect log files.
Git, Docs & Productivity
Generate Lorem ipsum placeholder text.
Generators
Preview Markdown as HTML.
Text & Strings
Generate Markdown tables from rows and columns.
Data Format Conversion
Convert Markdown to HTML.
Text & Strings
Build CSS media queries.
Color & CSS
Preview Mermaid diagrams.
Git, Docs & Productivity
Generate meta tags and Open Graph tags.
Web & Network
Look up MIME types by extension.
Web & Network
Translate text to and from Morse code.
Encoding & Decoding
Generate Nginx configuration.
Web & Network
Generate OAuth 2.0 PKCE verifiers and challenges.
Auth & Tokens
Convert between octal and text.
Encoding & Decoding
Preview Open Graph metadata.
Web & Network
Estimate password strength.
Validators
Convert keys and certificates between PEM and DER.
Hashing & Cryptography
Calculate percentages and percentage changes.
Number, Math & Units
Format and validate phone numbers.
Validators
Generate SVG placeholder images.
Images & Media
Run a Pomodoro timer.
Git, Docs & Productivity
Check primality and factor numbers.
Number, Math & Units
Convert between Punycode and internationalized domain names.
Encoding & Decoding
Convert values between pixels and rem units.
CSS
Format Python source code.
Code Formatting & Transformation
Parse and build query strings.
Web & Network
Encode and decode quoted-printable text.
Encoding & Decoding
Generate random strings from a custom charset.
Generators
Generate a README template.
Git, Docs & Productivity
Explain a regular expression token by token.
Text & Strings
Remove console.log statements from JavaScript.
Code Formatting & Transformation
Remove duplicate lines from text.
Text & Strings
Generate robots.txt files.
Web & Network
Convert between Roman numerals and integers.
Number, Math & Units
Apply ROT13 or a Caesar cipher shift.
Encoding & Decoding
Generate an RSA key pair in the browser.
Hashing & Cryptography
Evaluate scientific expressions.
Number, Math & Units
Compile SCSS to CSS.
Code Formatting & Transformation
Validate and compare semantic versions.
Validators
Generate sitemap XML.
Web & Network
Turn text into a URL-friendly slug.
Text & Strings
Decode Discord-style snowflake IDs.
Generators
Sort lines alphabetically, numerically or naturally.
Text & Strings
Format SQL queries with dialect, keyword-case and indentation options.
Code Formatting & Transformation
Format stack traces.
Git, Docs & Productivity
Escape and unescape JavaScript, Python, C and JSON strings.
Encoding & Decoding
Remove comments from JavaScript, CSS, HTML or Python.
Code Formatting & Transformation
Remove HTML tags from text.
Text & Strings
Compile Stylus to CSS.
Code Formatting & Transformation
Calculate subnet masks and host ranges.
Web & Network
Optimize SVG markup.
Images & Media
Convert tabs to spaces and vice versa.
Text & Strings
Sort Tailwind utility classes.
Code Formatting & Transformation
Generate a Tailwind 50–950 color scale.
Color & CSS
Build CSS text shadows.
Color & CSS
Convert times between time zones.
Time & Date
Convert between TOML and JSON.
Data Format Conversion
Generate TOTP codes from a shared secret.
Auth & Tokens
Convert to and from two's complement.
Number, Math & Units
Transpile TypeScript to JavaScript.
Code Formatting & Transformation
Escape and unescape Unicode sequences.
Encoding & Decoding
Inspect characters, code points and Unicode names.
Text & Strings
View unified diffs and patches.
Git, Docs & Productivity
Convert length, weight, temperature, pixels and points.
Number, Math & Units
Encode and decode URL components.
Encoding & Decoding
Inspect the parts of a URL.
Web & Network
Convert between standard and URL-safe Base64.
Encoding & Decoding
Parse browser and device information from a user agent.
Web & Network
Count words, characters, lines and bytes.
Text & Strings
Convert XLSX sheets to CSV or JSON.
Data Format Conversion
Format and validate XML.
Data Format Conversion
Validate YAML and report errors.
Data Format Conversion