Developer Tools That Just Work
47 free tools. No signup, no tracking, no cookies. Everything runs in your browser.
DNS Lookup
Look up DNS records for any domain. A, AAAA, PTR records with reverse DNS resolution.
SSL Certificate Checker
Check SSL/TLS certificates. Verify validity, issuer, expiry, SAN domains, and cipher strength.
HTTP Header Checker
Inspect HTTP response headers. Check security headers, caching policies, and server configuration.
WHOIS LookupNew
Look up domain registration details. Registrar, creation date, expiry, nameservers, and raw WHOIS data.
Redirect CheckerNew
Trace HTTP redirect chains. See every hop, status code, and the final destination URL.
Subnet CalculatorNew
Calculate network ranges from CIDR notation. Subnet mask, broadcast, first/last host, IP class.
API TesterNew
Test REST APIs from your browser. Custom headers, request body, response inspection, and history.
Website Status CheckerNew
Check if any website is up or down. See response time, status code, server info, and IP address.
Email ValidatorNew
Validate email addresses. Check syntax, verify MX records, and confirm the domain can receive mail.
Tech Stack DetectorNew
Detect technologies used by any website. Frameworks, CMS, CDN, analytics, and security headers.
JSON Schema ValidatorNew
Validate JSON data against a JSON Schema. Supports type checking, required fields, patterns, and more.
What Is My IPNew
Check your IP address, browser, screen resolution, timezone, and full device details instantly.
HTML to MarkdownNew
Convert HTML to Markdown and back. Supports tables, code blocks, lists, and nested elements.
Base ConverterNew
Convert numbers between binary, hex, octal, and decimal. BigInt support for large numbers.
Contrast CheckerNew
Check WCAG 2.1 color contrast ratio. Test AA and AAA compliance for text accessibility.
Image Compressor
Compress JPEG, PNG, WebP images. Resize, adjust quality, batch processing. All client-side.
Flexbox Generator
Visual CSS Flexbox playground. Build layouts with presets, customize all properties, copy CSS.
Meta Tag Generator
Generate SEO meta tags, Open Graph, and Twitter Cards. Preview Google and social media appearance.
HTTP Status Codes
Complete HTTP status code reference. Search, filter by category, detailed explanations and fixes.
Word CounterNew
Count words, characters, sentences, paragraphs. Reading time and text statistics.
Text Case ConverterNew
Convert text between UPPERCASE, lowercase, camelCase, snake_case, kebab-case & more.
JSON Formatter & Validator
Format, validate, and minify JSON. Syntax highlighting and error detection.
SQL Formatter
Format and beautify SQL queries. Auto-uppercase keywords, indent subqueries.
YAML ↔ JSON Converter
Convert between YAML and JSON formats instantly. Validate and format.
JSON ↔ CSV ConverterNew
Convert between JSON and CSV formats. Handles nested objects, download results.
Markdown Preview
Write Markdown and see the rendered output in real-time.
CSS & JS Minifier
Minify CSS and JavaScript to reduce file size. See compression stats.
Base64 Encode / Decode
Encode and decode Base64 strings. Supports text and file input.
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and expiration.
URL Encode / Decode
Encode and decode URL components. Handle special characters safely.
HTML Entity Encoder
Encode and decode HTML entities. Named, numeric, and hex modes.
String Escape / Unescape
Escape strings for JSON, Java, Python, SQL, Shell, XML, CSV, and Unicode.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any input.
Regex Tester
Test regular expressions with real-time matching and capture group display.
Cron Expression Generator
Build and parse cron expressions visually. See next run times instantly.
UUID Generator
Generate random UUID v4 identifiers. Bulk generate up to 100 at once.
Password Generator
Generate strong random passwords. Customize length, characters, see entropy.
QR Code Generator
Generate QR codes from any text or URL. Customize colors, size, error correction.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live clock.
Color Converter
Convert between HEX, RGB, HSL, and CSS color formats instantly.
Color Palette GeneratorNew
Generate harmonious color palettes. Complementary, analogous, triadic schemes. Export to CSS.
Text Diff
Compare two texts side by side. Highlight additions, deletions, and changes.
Lorem Ipsum Generator
Generate placeholder text. Choose paragraphs, sentences, or words.
CSS Gradient Generator
Create beautiful linear, radial, and conic gradients visually. Copy CSS instantly.
Box Shadow Generator
Design CSS box-shadow effects with live preview. Presets and full customization.
Chmod Calculator
Calculate Unix file permissions visually. Convert between symbolic and numeric notation.
Image to Base64
Convert images to Base64 strings. Get data URI, CSS background, and HTML embed code.
Need a Custom Tool?
We build custom developer tools, internal dashboards, and automation scripts for teams and companies. White-label solutions available. Fast turnaround, clean code.