Website & URL Tools

14 tools

• Broken Link CheckerScan outbound links from any URL for 404s and broken hrefs—paste a page and audit links in seconds.
• HTTP Header CheckerInspect HTTP response headers for any URL: cache control, content-type, CORS, and security-related values.
• Redirect Chain CheckerTrace the full redirect path to the final URL and spot unnecessary hops hurting SEO and performance.
• SSL Certificate CheckerVerify TLS certificate validity, expiry, issuer, and chain for any domain before users hit errors.
• DNS Lookup ToolQuery A, AAAA, MX, CNAME, TXT, NS, and SOA records for troubleshooting email, hosting, and DNS.
• WHOIS LookupLook up domain registration details: registrar, dates, and status for research and due diligence.
• IP Address LookupResolve IPv4 or IPv6 to geolocation, ISP, ASN, and hostname for network and fraud analysis.
• Domain Age CheckerSee how long a domain has been registered—useful for SEO trust signals and quick vetting.
• Robots.txt CheckerFetch and review robots.txt rules, directives, and sitemap lines to catch crawler misconfiguration.
• Meta Tags ExtractorExtract title, meta description, Open Graph, Twitter Card, and canonical tags from any live URL.
• Open Graph PreviewPreview how a link may appear when shared on social networks before you publish or pitch.
• Website Technology DetectorDetect CMS, frameworks, analytics, CDNs, and common scripts used on a site—great for competitive research.
• Canonical Tag CheckerConfirm canonical tags, targets, and self-references to reduce duplicate-content SEO issues.
• Server Response Code CheckerCheck HTTP status codes (200, 301, 404, 500, and more) for any URL in one request.

Code & Developer Tools

28 tools

• JSON Formatter & ValidatorFormat, validate, minify, and explore JSON in a collapsible tree—fix payloads before they hit production.
• JSON to CSV ConverterTurn JSON arrays into downloadable CSV with automatic column detection for spreadsheets and BI tools.
• JSON to YAML ConverterConvert JSON to readable YAML for configs and Kubernetes—copy or download the result.
• CSV to JSON ConverterPaste or upload CSV and get structured JSON with header-aware typing for APIs and apps.
• YAML to JSON ConverterParse YAML to valid JSON with clear errors—ideal for CI configs and cloud templates.
• XML Formatter & ValidatorBeautify and validate XML with structure insight and actionable parse errors.
• Regex Tester & DebuggerTest patterns live with highlights, capture groups, and flags—debug regex without leaving the browser.
• SQL FormatterPretty-print SQL with indentation and keyword casing for readable queries and code review.
• HTML Formatter & MinifierBeautify or minify HTML and compare raw markup with a quick rendered preview.
• CSS Formatter & MinifierFormat messy stylesheets or minify CSS for faster loads—keep design tokens consistent.
• JavaScript Formatter & MinifierPretty-print or minify JavaScript for debugging locally and shipping smaller bundles.
• HTML to Markdown ConverterConvert HTML snippets to Markdown for docs, CMS migrations, and README cleanup.
• Markdown to HTML ConverterTurn Markdown into HTML with a live preview—handy for emails, blogs, and static pages.
• Code Diff CheckerCompare two code blocks side by side with clear add/remove highlighting for reviews.
• JWT DecoderDecode JWT header and payload and check expiry—signature verification not included, client-side safe.
• Base64 Encoder & DecoderEncode text or files to Base64 or decode strings back—common for APIs, data URIs, and debugging.
• URL Encoder & DecoderPercent-encode query strings or decode encoded URLs for correct linking and parsing.
• Hash GeneratorGenerate MD5, SHA-1, SHA-256, and SHA-512 hashes from any string for checksums and testing.
• UUID GeneratorCreate one or many UUID v4 values with copy-friendly output for databases and APIs.
• Cron Expression GeneratorBuild cron schedules with simple controls and see the human-readable meaning instantly.
• Cron Expression ExplainerPaste a cron string for plain-English explanation and the next scheduled run times.
• Unix Timestamp ConverterConvert Unix epoch seconds or milliseconds to local time and back—essential for logs and APIs.
• Number System ConverterConvert between binary, octal, decimal, and hexadecimal for low-level debugging and study.
• .gitignore GeneratorPick your stack and download a tailored .gitignore so secrets and build artifacts stay out of git.
• Password GeneratorGenerate strong passwords with length and charset options—bulk mode for test accounts.
• Lorem Ipsum GeneratorCreate placeholder paragraphs, sentences, or words with optional HTML wrapping for mockups.
• Dummy Data GeneratorProduce fake names, emails, and addresses as JSON or CSV for fixtures and UI testing.
• HTML Entity Encoder & DecoderEncode special characters to entities or decode entity strings for safe HTML and CMS work.

Text & String Tools

16 tools

• Word CounterCount words, characters, sentences, paragraphs, and estimated reading time for articles and limits.
• Text Case ConverterSwitch between uppercase, lowercase, title, camelCase, snake_case, and kebab-case in one pass.
• Text Diff CheckerCompare two text versions with line-level highlights for copy, legal, and content workflows.
• Duplicate Line RemoverDeduplicate pasted lists with case-sensitive or insensitive matching for clean datasets.
• Text ReverserReverse full text, words per line, or each line—quick puzzles, tests, and obfuscation demos.
• Find & Replace ToolFind and replace plain text or regex patterns across long documents without an editor install.
• Slug GeneratorTurn titles into URL-safe, lowercase, hyphenated slugs for blogs, products, and routes.
• Line SorterSort lines A–Z, Z–A, by length, or randomly to tidy logs, lists, and imports.
• Whitespace RemoverTrim edges and normalize spaces so pasted content fits forms, CSVs, and code blocks.
• Text to Binary ConverterEncode text to binary strings or decode binary back to readable characters for learning and demos.
• ROT13 Encoder & DecoderApply ROT13 encode/decode in the browser for quick CTF-style or legacy text tasks.
• Caesar Cipher ToolEncrypt or decrypt with a custom Caesar shift—educational and lightweight obfuscation.
• Word Frequency AnalyzerRank word counts in pasted text to spot repetition, SEO stuffing, or vocabulary patterns.
• Email ExtractorPull every valid email from messy text or HTML into a deduplicated list for outreach prep.
• URL ExtractorExtract URLs from blobs of text or HTML for audits, archiving, and link inventories.
• Comma Separator ToolConvert newline lists to comma-separated values or split CSV-style lines into rows.

File & Data Tools

10 tools

• CSV Viewer & EditorOpen CSV as a sortable, filterable table, tweak cells, and export without a spreadsheet app.
• CSV DeduplicatorRemove duplicate rows by chosen columns to clean mailing lists and product feeds.
• CSV to SQL ConverterGenerate INSERT statements from a CSV for quick database seeding and migrations.
• Image to Base64 ConverterEncode images to Base64 data URIs for embedding in HTML, CSS, or API payloads.
• Image ResizerResize by pixels or percentage in the browser—privacy-friendly, no server upload required.
• Image CompressorShrink JPG and PNG with quality control and before/after size stats for faster pages.
• Image Format ConverterConvert between JPG, PNG, and WebP locally to match CMS, email, and performance needs.
• Image Metadata ViewerInspect EXIF: camera, lens, GPS, dimensions, and exposure—great for photographers and forensics.
• File Hash CheckerCompute MD5, SHA-1, and SHA-256 hashes of uploads to verify downloads and integrity.
• SVG OptimizerMinify and clean SVG markup to cut file size for icons, illustrations, and inline graphics.

Design & Color Tools

12 tools

• Color Picker & ConverterPick colors and copy HEX, RGB, HSL, and CMYK values for design systems and handoff.
• Color Contrast CheckerTest text and background pairs against WCAG AA and AAA contrast ratios for accessible UI.
• Color Palette GeneratorFrom one base hue, build complementary, triadic, analogous, and monochrome palettes.
• Gradient GeneratorDesign linear and radial gradients visually and copy production-ready CSS in seconds.
• Tint & Shade GeneratorGenerate lighter tints and darker shades from a brand color for consistent UI scales.
• Color Blindness SimulatorPreview images or palettes under common color-vision deficiencies to validate inclusive design.
• Box Shadow GeneratorTune offset, blur, spread, color, and inset shadows with live preview and copyable CSS.
• Border Radius GeneratorAdjust each corner visually and export shorthand border-radius for cards and buttons.
• CSS Gradient GeneratorBuild multi-stop gradients with angles and stops—outputs clean, modern CSS gradients.
• Flexbox PlaygroundTweak flex container and item properties and see layout updates in real time.
• CSS Grid PlaygroundPrototype grid templates, gaps, and placement with instant visual feedback.
• Favicon GeneratorCreate favicon.ico and PNG sizes from an image or text for every device and browser tab.

Security & Encryption Tools

10 tools

• Password Strength MeterScore password entropy, estimate crack time, and get practical hardening tips.
• bcrypt Hash GeneratorGenerate bcrypt hashes with configurable cost for secure password storage testing.
• AES Encrypt & DecryptEncrypt and decrypt text with AES-256 and a passphrase—runs fully in your browser.
• RSA Key Pair GeneratorCreate 1024–4096 bit RSA public/private key pairs locally for demos and dev workflows.
• CSP BuilderToggle Content-Security-Policy directives and copy a header value ready for your server.
• Security Headers CheckerAnalyze security-related HTTP headers on any URL with graded guidance to harden responses.
• JWT EncoderBuild HS256-signed JWTs from custom header and payload for API and auth testing.
• HMAC GeneratorCreate HMAC-SHA256 or HMAC-SHA512 signatures with a secret for webhook and API verification.
• SSL Certificate DecoderPaste PEM certificates to read subject, issuer, SANs, and validity windows.
• .htaccess GeneratorAssemble common Apache .htaccess rules for redirects, HTTPS, caching, and access control.

SEO Tools

10 tools

• Meta Title & Description CheckerCheck title and meta description lengths against common search snippet limits before publish.
• Keyword Density CheckerMeasure keyword frequency, density, and prominence in your page copy for on-page SEO.
• Readability Score CheckerRun Flesch-Kincaid style analysis with grades and suggestions for clearer content.
• robots.txt GeneratorBuild a valid robots.txt with allow/block rules and sitemap URL for crawler control.
• XML Sitemap GeneratorTurn a URL list into a standards-compliant XML sitemap for Search Console submission.
• Schema Markup GeneratorFill forms to output JSON-LD for articles, FAQs, products, reviews, and more.
• Open Graph Tag GeneratorGenerate Open Graph meta tags and preview social share cards for marketing QA.
• Hreflang Tag GeneratorPair URLs with language and region codes to output correct hreflang clusters for multilingual SEO.
• Redirect Type CheckerSee whether a URL returns 301, 302, or other redirects plus timing for migration audits.
• UTM Link BuilderAdd UTM parameters for source, medium, campaign, and term to track campaigns in analytics.

API Developer Toolbox

8 tools

• HTTP Request BuilderTest, document, and debug APIs without leaving the browser—pick method, headers, and body, then send with fetch.
• API Response FormatterPaste any JSON or XML API response: pretty-print, validate, and explore a collapsible tree view.
• OpenAPI / Swagger ViewerPaste OpenAPI in YAML or JSON and browse interactive docs—paths, schemas, and examples in one place.
• Webhook Payload TesterPractice webhook debugging client-side: log sample POST bodies locally (e.g. localStorage) when a public capture URL is not available.
• HTTP Status Code ReferenceSearch HTTP status codes with plain-English meanings, typical causes, and what to do next.
• MIME Type LookupMap filenames or extensions to MIME types for Content-Type headers, uploads, and API contracts.
• OAuth 2.0 Flow VisualizerWalk through the authorization code flow step by step with interactive fields and diagrams.
• API Rate Limit CalculatorGiven X requests per minute and a daily budget of Y calls, see pacing and when you hit the wall.