97 free developer tools Developer tools. Free, no sign-up.
Formatters, validators, and generators for everyday coding.
- Most tools run in your browser
- Uploads deleted after processing
- Free, no account
About this category
About developer tools
Developers reach for the same small utilities constantly: format some JSON, decode a token, validate a payload, generate a hash, or convert between encodings. This category brings those together as fast, no-setup web tools. They run entirely client-side, so you can safely paste API responses, config, and other sensitive data without it ever being uploaded.
How it works
- 1Pick a toolOpen any tool from the list. There is nothing to install and no account to create.
- 2Add your file or textDrop a file, paste text or type your values. Most tools work right in your browser.
- 3Get your resultDownload or copy the result. Files sent to our server are deleted once it is ready.
The collection
All developer tools
Search, filter or sort to find the right one. Every tool opens instantly.
97 tools, all free
SVG Animation Generator
Animate any SVG with CSS: choose from 15 effects such as Draw, Spin and Pulse, animate the whole graphic or each element, then export CSS, a self-contained animated SVG or a React component.Open tool
Anchor Text & Link Extractor
Extract internal/external href links, anchor texts, and rel='nofollow' attributes from raw HTML. Free, private, browser-based anchor text and link extraction tool.Open toolAPK Signature Checker
Verify Android APK digital signature certificates and v1/v2/v3 signing schemes.Open toolApp Icon Generator (Android & iOS)
Generate complete icon asset packages for iOS App Store, Android Play Store, and web PWA apps.Open toolApple Touch Icon Generator
Create high-resolution 180x180 PNG Apple Touch Icons for iOS Safari web bookmarking.Open toolBarcode Generator (Code 128 / EAN / UPC)
Generate Code128, CODE39, EAN-13, and UPC barcodes with instant vector SVG downloads. Free, private, browser-based barcode generator.Open toolBase64 Encode/Decode
Encode text to Base64 or decode Base64 back to text. Free, private, browser-based Base64 encoder and decoder.Open toolBroken Link Checker & Auditor
Audit HTML content or web pages for broken links and 404 HTTP errors. Free, private, browser-based broken link checker and auditor.Open toolBrowser Frame Screenshot Generator
Wrap screenshots inside modern dark or light browser window frames with address bars.Open toolColor Blindness Simulator
Simulate Protanopia, Deuteranopia, Tritanopia, and Monochromacy vision on images for UI accessibility auditing.Open toolColor Converter
Convert colors between HEX, RGB, RGBA, HSL, and HSLA formatsOpen toolColor Picker
Pick colors visually and copy accurate HEX, RGB, and HSL values for websites, apps, illustrations, and design projects.Open tool
Core Web Vitals Checker
Check any page’s Core Web Vitals (LCP, INP and CLS) from real Chrome users, plus a Lighthouse lab test, on mobile or desktop.Open toolCron Expression Parser
Parse 5-field cron schedules into clear human-readable sentences and execution interval summaries.Open toolCSS Border Radius Generator
Visually customize top-left, top-right, bottom-right, and bottom-left corner radii with real-time CSS preview. Free, private, browser-based CSS border radius generator.Open toolCSS Border Triangle Generator
Generate pure CSS directional arrow and triangle shapes using CSS border techniques. Free, private, browser-based CSS triangle generator.Open toolCSS Box Shadow Generator
Design sleek drop shadows and inset shadows with controls for offset, blur, spread, color, and opacity. Free, private, browser-based CSS box shadow generator.Open toolCSS Clamp Generator
Calculate fluid responsive typography formulas using CSS clamp(min, val, max). Free, private, browser-based CSS clamp generator.Open toolCSS Clip-Path Generator
Visual CSS clip-path builder for polygon, circle, ellipse, and inset shapes. Free, private, browser-based CSS clip-path generator.Open toolCSS Filter & Backdrop Filter Generator
Visual CSS filter sliders for blur, brightness, contrast, grayscale, hue-rotate, and saturation.Open toolCSS Flexbox Layout Generator
Interactive visual CSS Flexbox builder. Tweak direction, alignment, justification, and gap properties with live CSS code output.Open toolCSS Glassmorphism Generator
Generate frosted glass background blur and transparency CSS code with live visual preview.Open toolCSS Gradient Generator
Create linear and radial CSS background gradients with customizable angles, colors, and live previews.Open toolCSS Grid Layout Generator
Interactive visual CSS Grid layout builder. Customize columns, rows, and gaps with live CSS rules.Open toolCSS Keyframe Animation Generator
Visual CSS animation builder. Tweak bounce, pulse, spin, shake keyframes with live CSS code generation.Open toolCSS Loader & Spinner Generator
Generate pure CSS loading spinners, pulsing indicators, progress bars, and bouncing dot animations.Open toolCSS Minifier
Minify CSS by removing whitespace, comments, and redundant rulesOpen toolCSS Usage & Selector Analyzer
Analyze CSS stylesheets to count total selectors, declarations, media queries, and uncompressed size.Open toolDevice Mockup Generator
Wrap website screenshots inside realistic iPhone and MacBook device frames for marketing showcases.Open tool
DNS Record Lookup Tool
Look up A, AAAA, MX, TXT, CNAME, NS, SOA, CAA and SRV records for any domain. Results come straight from public DNS resolvers.Open tool
Docker Compose YAML Validator
Check a docker-compose.yml file for YAML syntax errors and common Compose mistakes, with the exact line of each syntax error.Open toolExcel CSV to JSON Converter
Upload CSV/Excel spreadsheet files to extract clean JSON object arrays.Open toolFile Metadata & System Inspector
Inspect file MIME type, exact byte size, extension, and last modified date diagnostics.Open toolGoogle Drive Direct Share Link Generator
Convert Google Drive share links into direct download and embedded streaming URLs.Open toolGoogle Fonts Pair Generator
Discover curated Google Font pairings for website titles and body paragraphs with live CSS code.Open toolGraphQL Query Formatter
Format and beautify raw unindented GraphQL queries and schema definitions.Open toolHash & Encoder Tool
Generate cryptographic hashes and encode/decode text in Base64 and URL formats.Open toolHMAC Signature Generator
Generate HMAC-SHA256, HMAC-SHA512, or HMAC-SHA1 message authentication signatures with a secret key.Open toolHTML Entity Encode/Decode
Encode or decode HTML entities like & < > "Open toolHTML Formatter
Beautify and format messy or minified HTML code instantly.Open toolHTML Minifier
Minify HTML by removing unnecessary whitespace and commentsOpen toolHTML SEO Meta Tag Generator
Generate complete <head> SEO meta tags including Title, Description, Open Graph, and Twitter Cards.Open toolHTML Table Generator
Visual HTML table builder. Set custom rows, columns, and header options with live HTML markup output.Open toolHTML to React JSX Converter
Convert HTML markup into valid React JSX component code with automated attribute renaming.Open toolHTML Validator & Accessibility Auditor
Audit HTML code for missing alt attributes, duplicate element IDs, unclosed tags, and doctype declarations.Open toolInteractive CSV Data Grid Viewer
View, search, and filter CSV data files in an interactive client-side data table.Open tooliPhone Screenshot Frame Generator
Wrap iOS app screenshots inside iPhone 15 Pro Dynamic Island device frames.Open toolJavaScript Beautifier
Format and beautify your minified or messy JavaScript code instantly. Features a full screen editor and customizable indentation options.Open toolJavaScript Bundle Size Analyzer
Calculate uncompressed vs minified JavaScript byte sizes and savings percentage.Open tooljQuery Beautifier
Format and beautify your minified or messy jQuery code instantly. Make your DOM manipulation code clean, readable, and easy to debug.Open toolJSON Diff & Comparison
Compare two JSON payloads side-by-side. Highlight added, removed, and modified key-value fields instantly.Open toolJSON Formatter
Format, validate, and minify JSON data with syntax highlightingOpen toolJSON Schema Generator
Convert sample JSON objects into official draft-07 JSON Schema definitions client-side.Open toolJSON to Excel / CSV Converter
Convert JSON object arrays into downloadable Excel CSV spreadsheet files.Open toolJSON to TypeScript Converter
Convert JSON object payloads into strongly typed TypeScript interface and type definitions.Open toolJSON Validator & Interactive Tree Viewer
Validate JSON syntax with line-by-line error messages and explore data in an interactive collapsible tree view.Open toolJSONPath Query Tester
Test JSONPath query expressions against JSON objects with instant result evaluation.Open toolJWT Decoder & Inspector
Decode JSON Web Tokens instantly client-side. Inspect claims, header parameters, payload data, and token expiration dates securely.Open toolKeyword Grouping & Clustering Tool
Group lists of search terms into semantic keyword clusters based on shared topic stems.Open toolLorem Ipsum Generator
Generate placeholder text for your designs, mockups, and layoutsOpen toolMarkdown Table Generator
Visual Markdown table builder. Set custom rows, columns, and text alignment options with live Markdown syntax output.Open toolNeumorphism CSS Generator
Generate soft UI neumorphic shadows, inset press effects, and smooth CSS gradients.Open toolNumber Base Converter
Convert numbers between binary, octal, decimal, and hexadecimalOpen toolOpen Graph Meta Tag Generator
Design og:title, og:description, and og:image tags with live Facebook and LinkedIn card previews.Open toolOpenAPI / Swagger Spec Viewer
Render OpenAPI 3.0 and Swagger JSON specifications into interactive API documentation.Open toolPEM Certificate & Key Viewer
Inspect PEM SSL certificates, RSA/ECC private keys, and CSR structure diagnostics client-side.Open toolQR Code Scanner
Scan and decode QR code images to extract embedded URLs, text, and data payloads.Open toolRegex Pattern Tester
Test and debug regular expressions in real-time with pattern flags, match highlighting, and group capture breakdowns.Open toolSQL INSERT to JSON Converter
Convert SQL INSERT INTO statements and value tuples into structured JSON object arrays.Open toolSQL Query Builder
Visual SQL query builder for SELECT, INSERT, UPDATE, and DELETE queries with conditions and filters.Open toolSQL Query Formatter
Beautify and clean up raw, unformatted SQL queries with consistent keyword capitalization and structured line breaks.Open toolSQL Query Minifier
Minify SQL queries into compact single-line strings by stripping comments and redundant whitespace.Open toolSVG Blob Shape Generator
Create organic, smooth SVG blob shapes for graphic designs and modern web layouts.Open toolSVG Path Editor & Viewer
Interactive visual editor and previewer for SVG path data commands with live graphic rendering.Open toolSVG to React (JSX) Converter
Convert raw SVG XML string into production-ready React JSX components with camelCased attributes.Open toolSVG Vector File Viewer
Render SVG files and vector XML strings with customizable stage background colors.Open toolSVG Wave Generator
Generate customizable vector SVG divider waves for modern website section transitions.Open toolTOML Formatter & JSON Converter
Format TOML configuration files and convert seamlessly between TOML and JSON formats.Open toolTSV (Tab-Separated) Grid Viewer
View, search, and filter tab-separated value (TSV) datasets in an interactive table.Open toolUnix Timestamp Converter
Convert Epoch Unix timestamps to human-readable local time, UTC date strings, and ISO 8601 timestamps instantly.Open toolURL Encode/Decode
Encode or decode URL components and full URLsOpen toolUser-Agent Parser & Analyzer
Analyze browser user-agent strings to extract browser name, version, operating system, and rendering engine.Open toolUUID Generator
Generate random UUID v4 identifiers for your projectsOpen toolVisual Cron Expression Builder
Visual 5-part cron schedule builder with plain English execution explanations and common presets.Open toolVisual GraphQL Query Builder
Build GraphQL queries visually by selecting operation types, root entity names, and field tags.Open toolVisual Regex Pattern Generator
Generate regular expressions for emails, URLs, phone numbers, IP addresses, dates, and alphanumeric strings.Open toolWCAG Color Contrast Checker
Calculate color contrast ratios for text and background colors against WCAG 2.1 AA and AAA accessibility standards.Open toolWeb App Manifest.json Generator
Create standard Web App Manifest.json files for Progressive Web Apps (PWA) and mobile web installability.Open toolWebsite Screenshot Generator
Generate responsive desktop and mobile screenshot mockup previews for any web URL.Open tool
Website Speed & Server Response Tester
Measure how fast a website’s server responds: time to first byte, download time, redirects, page size, compression and caching, with a clear A–F grade.Open toolWebsite Technology Stack Detector
Detect web frameworks, CMS platforms, servers, analytics, and security CDNs for any URL.Open toolXML Document Viewer
Inspect XML documents and raw XML string structures with syntax highlighting.Open toolXML Formatter & Validator
Validate XML syntax and format unindented XML documents with clean indentation.Open toolXML to JSON Converter
Convert complex XML documents and structures to clean, formatted JSON objects client-side.Open toolYAML & JSON Converter
Bi-directional YAML to JSON and JSON to YAML online converter. Format and convert configuration files client-side.Open toolYAML Configuration Viewer
View and inspect YAML configuration files and Kubernetes deployment manifests.Open toolYAML Formatter & Validator
Validate YAML syntax, detect indentation errors, and format configuration files.Open tool
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