oerli.ai — Site Crawler & Tool Hub

crawler

🔍Site Crawler

seo

📊SEO Issues Audit 🏷Meta Tag Checker ↪️Redirect Checker 🤖Robots.txt Tester 📡HTTP Header Analyzer 🌐DNS Lookup 🏷Meta Tags Generator 🔍Batch OG Debugger 🖼OG Image Generator 🌐Domain Info 🗺Sitemap Viewer 📊UTM Builder 📂Sitemap Generator ⚙️Robots.txt Builder

utility

🔄Base64 Encoder 🔒Password Generator 🔗URL Encoder 📝Lorem Ipsum 📊Word Counter ▣QR Code Generator ⬜Aspect Ratio 🌍IP Lookup AaCase Converter 😀Emoji Picker ⚖️Unit Converter 🔗Text to Slug 🔄Text Transform 🖼Placeholder Scenes 🍅Pomodoro Timer ⏱️Stopwatch ⭐Favicon Generator 📈Text Statistics 👤Avatar Generator 📧Email Validator 📱Social Char Counter ✂️Link Shortener •–Morse Code 10Binary/Text ↕Line Sorter ⌨️Typing Test ⏳Countdown Timer A█ASCII Art 🗣Text to Speech 💳Luhn Check 👤vCard Generator 🔐ROT13 ⅣRoman Numerals 📅Date Difference 🧧Tip Calculator %Percent Calculator 🔠Caesar Cipher 💰Compound Interest ⏱️Progress ETA ↹Text Wrap 🎤NATO Phonetic 🎮Leet Speak ⇄Reverse Text 🖨Print Size ◻Golden Ratio ♟Anagram Check 🐷Pig Latin 📖Readability ♪BPM / delay 🔒Affine cipher 🔑Vigenere ⋯Tap code 🚨Speed convert ≏Unique lines 📊Word frequency ▬Text pad 🔙Atbash 🎲Random line 🔁String repeat 🔀Shuffle lines ∩Line sets 🎤Soundex ➞Line prefix ➕Split and join 🔢Ordinal numbers 📈Percent change ∠Angle convert ⌨️WPM calculator 🔁Palindrome check ↓Acrostic 🔤N-grams ⚡Passphrase entropy ⏲️Reading time 📅ISO week ∞GCD / LCM ℓPrime check 🌱Seeded PRNG 🔠Random integers ↹Hard wrap 🎲Dice roller 🔄String rotate 🧪Factorial ⚪Binomial 📐Fibonacci ∑Number list stats 📖ISBN check 🗜Run-length text ↔️Permutations ∧LCM list 🥓Bacon cipher 🔀Collatz ⚖️BMI √Quadratic roots △Heron triangle ⊟Chunk text ℓLog any base ⇌AP / GP 🌙Moon phase ⬣Regular polygon ↔2D distance ¼Fraction fit 📊Percentiles ●Solid formulas λPoisson PMF 🎲Binomial PMF 📍Geohash ┆Paste columns ∞Digital root ◯Circle calc ⍺Drop blank lines →Line prefix / suffix ⇅Reverse lines 📄Filename safe …Range expand ⏱Duration parse 🎲Random lines ▬Pad lines ↕Natural line sort ⠿Braille letters ◻Text box 🌍Haversine distance ⟳ROT47 ⏲ISO 8601 duration 💳Card BIN hint 🌍Time zone view €VAT calculator ∼Hz & period 🔐Password score △Triangle angles nNumeronyms ≈Significant figures ↔Linear map ⌑DMS ↔ decimal degrees ∶Ratio simplify ∆Pascal triangle ⊕RPN calculator zZ-scores %Percentile rank ⨯Cross product ⋅Dot product ΣCumulative sum ⟳ASCII rotate ♪MIDI to Hz ⬟Polygon area □2x2 matrix ∟Polar coordinates ℂQuaternion normalize ↔Line from two points €Margin and markup ❄Wind chill 💧Dew point ⁄Percent of

developer

⚡API Tester 🔐JWT Decoder 🎨Color Picker #️Hash Generator ✍️Markdown Preview ±Text Diff .*Regex Tester ⏰Unix Timestamp ⏱️Cron Parser 🆔ID Generator 🖼Placeholder Image 🔐Chmod Calculator 🔍JSON Path Finder △SVG Preview &aHTML Entities ▦CSS Grid Generator 🌈Gradient Generator ◯Border Radius ■Box Shadow 01Number Base TSJSON to TypeScript 🗃SQL Formatter 🖥Screen Size 📏PX/REM Converter ⬜Flexbox Playground ±JSON Diff 🎨Tailwind Colors 📡HTTP Status Codes 📋Table Generator 📷Code Screenshot ▓Noise Generator 💾Bytes Converter H1Heading Style 🔑JWT Builder 🌐IP/Subnet Calculator \\String Escape 🌳JSON Tree Viewer ◑Contrast Checker </HTML Preview 🐙GitHub Stats 📏CSS Units 🎲Mock Data 〰️CSS Easing ⌨️Keyboard Codes 🔤Random Strings 🔗URL Parser 📦Semver Compare 🎨Color Scale 📁MIME Lookup 🖌Screen Color Picker 💬Shell Escape 🧩UUID Tools 🏷Badge Builder ✨Unicode Normalize 🔄Regex Replace 🔧SRI Hash 🖋Conventional Commits ▤CSV to Markdown </XML Escape ↔️HTTP Methods 🔢Base32 🖥Hex Dump 📝Line Numbers 🔗URL Join 🐋Docker run 🔐HMAC-SHA256 ✓CRC-32 📄Base64URL ⛶Bracket check 🧠Float bits ┆CSV column ↔Edit distance 🌐Hostname check ≠Hamming distance ⚙️Env lines ❓Query string 🧹Strip invisible →Tab / spaces 📊Character stats ⇄CSV transpose 💻Strip ANSI 📊Excel columns ≈String similarity 🔢Hex UTF-8 📦Random hex 🔐PBKDF2 ↔️Line lengths ⤊Nesting depth 📋JSON sort keys ↕️vh to px 🔌MAC format ✉️Quoted-printable 🔢Base58 hex 🔗Slug check ℎShannon entropy ▫Gray code ↕️Sort IPv4 ⇄Endian swap ⊕Hex XOR 📱Screen PPI 🆔ULID generator 🎨Hex color mix ◍Hex to HSL ✒️CRC-16-CCITT ⎉Line / column 📁Path slashes ↔️CSS clamp()🌳mkdir from tree ✓Pick lines ⎈NDJSON format #Regex count ⒶASCII printable 📂Path segments ↳Indent lines ✦CamelCase split ≪Regex extract ✂Cut fields ◍HSL → hex ↰Dedent text ◈Template replace ⊞JSON merge 🌐URL / IDN host ≏JSON flatten ⚙INI → JSON 🔢LCG sequence ↵Line endings ∉Regex line filter ▤UTF-8 byte freq #Hash length hint ┆CSV column check 🌈Wavelength color ≡Flex shorthand ±Word diff 🌐IPv6 expand / compress ∿Cubic Bézier point &Hex bitwise ⚙EditorConfig → JSON ⟨Bracket checker ◈Color steps 〰Google polyline “CSV field escape ⋯Hex chunk []Lines ↔ JSON array ⏰Cron syntax check ➕Semver bump bBencode decode ⌚ULID decode ⎈Grapheme count ◍Hex to LAB ↕Sort semver lines ⬜CRC-8 ⁕Population count

converter

⇄TSV transpose “Delimited → CSV ◼CMYK ↔ RGB ⏲SRT time shift

View all tools →

MIDI ↔ Hz

All Tools Pipeline API

Twelve-tone equal temperament; A4 = 440 Hz.

MIDI note (0–127 typical)

Note 69 -> 440.00000 Hz

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