Pengembang & Utilitas
Slug Generator
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OG Preview Validator
Preview how your link looks on Facebook, LinkedIn, Twitter. Validate OG tag lengths and image requirements before publishing.
Color Contrast Checker
Minimal 4.5:1 untuk teks normal (WCAG AA). 7:1 untuk AAA.
Markdown to HTML Converter
Konversi Markdown ke HTML secara real-time. Mendukung heading, bold, italic, link, gambar, list, kode, blockquote, tabel, dan garis horizontal.
Regex Tester
Uji regex secara real-time. Berguna untuk validasi form, ekstraksi data, redirect URL, dan analisis teks.
JSON Formatter & Validator
Format, validasi, dan minify JSON. Lihat struktur data via tree view. Berguna untuk API, konfigurasi, dan debugging.
URL Encoder/Decoder
Encode URL agar aman untuk parameter. Decode URL untuk membaca aslinya. Berguna untuk SEO, analytics, dan debugging.
Base64 Encoder/Decoder
Encode teks ke Base64 (untuk data URI, API payload). Decode Base64 kembali ke teks. Mendukung Unicode/UTF-8.
HTML Entity Encoder/Decoder
Encode karakter spesial ke HTML entities (<, &, 😀). Decode entities kembali ke teks. Berguna untuk web development dan SEO.
Image to Base64 Converter
Konversi gambar ke Base64 data URI. Berguna untuk embed gambar di CSS, HTML, atau JavaScript tanpa file terpisah.
UTM Campaign Link Builder
Bangun URL dengan parameter UTM untuk melacak sumber traffic di Google Analytics. Wajib untuk mengukur kampanye iklan, email, dan link affiliate.
CSV↔JSON Converter
Konversi CSV ke JSON dan sebaliknya. Mendukung header otomatis, trim spasi, skip baris kosong, dan flatten nested objects.
Sitemap XML Validator
Validasi sitemap.xml sesuai protokol sitemaps.org: batas 50.000 URL / 50MB, format lastmod W3C, rentang priority, nilai changefreq, URL duplikat, campuran domain, HTTP vs HTTPS, dan escaping karakter.
🎨 Color Palette Generator
Generate harmonious color palettes from any base color. WCAG contrast checking, CSS export, and one-click copy.
🔗 URL Slug Bulk Generator
Convert a bulk list of page titles into clean, SEO-friendly URL slugs. Options for separator, stop-word removal, length cap, lowercase. Validates each result and flags duplicates or over-long slugs.
Color Palette from Image
Upload any image to extract its dominant colors. Perfect for creating cohesive design palettes, matching brand colors, or finding accent colors for web design. All processing happens client-side — your images never leave your browser.
⬛ QR Code Generator
Generate scannable QR codes from any text, URL, email, phone, or Wi-Fi credentials. Adjust error-correction level (L=7% / M=15% / Q=25% / H=30% recoverable), module size, and color theme. Download as PNG or SVG, or copy the image straight to your clipboard. Renders in your browser using a battle-tested MIT-licensed encoder (Kazuhiko Arase) loaded from jsDelivr — nothing leaves your device.
🔢 HTML Entity Counter
Count and analyze every HTML entity in your code — named (&), decimal ({), and hex (😀). See frequency tables, category breakdowns, decoded characters, and spot unusual patterns. Essential for auditing third-party HTML, cleaning up encoded content, and verifying entity consistency. Works entirely in your browser.
📋 Markdown Table of Contents Generator
Paste your Markdown content and instantly generate a clean, anchor-linked table of contents. Converts headings into GitHub-compatible anchor links with proper indentation. Perfect for README files, documentation, blog posts, and long-form content. Works entirely offline.
🔗 URL Parameter Analyzer
Paste any URL and get a complete audit of its query parameters. Identifies tracking parameters (UTM, click IDs, analytics), highlights duplicates and empty values, and generates a clean canonical URL with strippable parameters removed. Essential for SEO audits, Google Search Console investigations, and analytics hygiene. Works entirely offline.
🔄 Sitemap Diff & Compare Tool
Paste two sitemaps (A = before, B = after) — get a complete diff: added URLs, removed URLs, modified URLs (lastmod/priority/changefreq), and unchanged count. Useful for comparing preview-vs-prod sitemaps, tracking content drift across deploys, or auditing what changed between two Google Search Console exports. Pairs with Sitemap XML Validator (#38).
🔁 Redirect Chain Analyzer
Paste a list of single-hop redirects (nginx/Apache/CSV/arrow) — the tool walks every chain, detects redirect loops (A→B→A), finds multi-hop chains (A→B→C that should be A→C), and flags fork-bombs (one source pointing to two targets). Pairs with the 301 Redirect Map Generator (#31).
🌐 Hreflang Validator
Validate your hreflang implementation — parse raw HTML or enter language-URL pairs manually. Checks BCP 47 codes, x-default presence, duplicates, invalid URLs, self-referencing, and reciprocal consistency. Get a 0-100 score with prioritized fixes.
Bulk URL HTTP Status Checker
Check up to 100 URLs in bulk. Format-only validates URL syntax (fast, no network). Full check makes HEAD/GET requests with timeout — note that some servers may block CORS requests from the browser, in which case the URL will be marked as "CORS-blocked" (format OK, network untested). Status codes: 2xx = OK, 3xx = redirect (chain shown), 4xx = client error, 5xx = server error.
🏷️ SEO Title Tag Generator
Generate optimized title tags with perfect length, keyword placement, and live SERP preview. Title tags are the #1 on-page SEO factor — get them right.
📄 Log File Analyzer
Parse Apache/nginx access logs instantly. See top URLs, status codes, bandwidth usage, user agents, and hourly traffic patterns. No data leaves your browser.
Text Diff & Merge Tool
Compare two text inputs and highlight differences line-by-line and word-by-word. Supports side-by-side and unified views, merge output, and diff statistics. Essential for developers, content editors, and anyone comparing document versions.
JWT Decoder & Inspector
Decode JSON Web Tokens (JWTs) in your browser — inspect header, payload, and claims. Shows algorithm, expiration status, issued-at, and pretty-prints all claims. No data leaves your client. Essential for debugging auth flows, OAuth, and API integrations.
Regex Tester & Explainer
Test regular expressions against sample text in real-time. See matches highlighted, capture groups extracted, match counts, and a built-in regex cheat sheet. Supports global, case-insensitive, and multiline flags. Essential for developers, data analysts, and anyone working with pattern matching.
Unix Timestamp Converter & Epoch Calculator
Convert between Unix timestamps (epoch) and human-readable dates. Supports seconds, milliseconds, batch conversion, interval arithmetic, and live current-timestamp display.
Hash Generator & Checker
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or file upload. Verify hash integrity with comparison mode.
UUID/GUID Generator
Generate random UUIDs (v4), GUIDs, and custom-format unique identifiers. Batch generation with hyphen control.
Password Generator & Strength Checker
Generate secure random passwords and check strength against complexity, entropy, and common-pattern rules. Configurable length and character sets.
Cron Expression Parser & Next Run Time Calculator
Parse cron expressions and calculate next run times. Supports standard 5-field format, predefined schedules (@daily etc.), and shows the next 10 execution times.
Dekoder & Validator JWT
Dekode, periksa, dan validasi JSON Web Tokens (JWT). Parse header, payload, claims, kedaluwarsa, dan deteksi masalah — 100% client-side.
Generator Docker Compose & Optimizer Dockerfile
Generate Docker Compose YAML dan Dockerfile yang dioptimalkan. Template multi-service (web+db+cache), praktik terbaik layer, optimasi ukuran, dan health checks.
309. Cron Expression Generator & Explainer
Generate cron expressions from human-readable schedules, or decode any cron expression into plain English. Validates syntax, explains each field, and shows next run times.