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All 41 CodDepot tools organized into 3 categories. Pick a category below to see its dedicated landing page with full descriptions, or jump straight into any tool. Everything is free and runs entirely in your browser — no sign-up, no upload, no tracking of your input.

Developer

14 tools

Everyday utilities for coding, debugging, and testing.

  • 🧾JSON Formatter / ValidatorFormat, minify, and validate JSON with syntax highlighting.
  • 🔐Base64 Encoder / DecoderEncode plain text to Base64 or decode it back.
  • 🔗URL Encoder / DecoderPercent-encode and decode URL components.
  • 🔍Regex TesterTest regular expressions, highlight matches, and inspect groups.
  • 🪪JWT DecoderDecode JWT header, payload, and signature, and check expiry.
  • 🎨Color Picker & ConverterConvert between HEX, RGB, and HSL with a live preview swatch.
  • 📝Markdown to HTMLRender Markdown to HTML with live side-by-side preview.
  • 🔀Diff CheckerLine-by-line diff between two texts with add/remove stats.
  • ⏰Cron Expression GeneratorBuild a cron expression visually and read it back in English.
  • 🔣HTML Entity Encoder / DecoderEncode reserved/unicode characters to HTML entities and back.
  • 🕐Epoch & Unix Timestamp ConverterConvert Unix timestamps to human-readable dates and vice versa.
  • 🖼️SVG Viewer & EditorView, edit, optimize and export SVG files online.
  • 🗺️GeoJSON Viewer & ValidatorVisualize, validate and inspect GeoJSON data on an interactive map.
  • 🔠Hex / ASCII / Binary ConverterLive four-panel converter (hex / ASCII / binary / decimal) with hex dump and small file upload.
Browse all Developer tools →

Marine & Maritime Tools

17 tools

Free online tools for marine engineers, vessel operators, and maritime developers.

  • 📡AIS Message DecoderDecode AIS NMEA sentences (Types 1–3 position reports and Type 5 voyage data) at the bit level.
  • 📻AIS Message EncoderBuild a valid AIS Type 1 position report from form inputs with step-by-step encoding.
  • 🧭NMEA 0183 Sentence ParserAuto-detect and decode 17+ NMEA 0183 sentence types with checksum validation.
  • 🛟NMEA 0183 Checksum CalculatorValidate or generate the XOR checksum for any NMEA 0183 sentence, with step-by-step XOR.
  • 🛰️NMEA 2000 PGN DecoderParse the 29-bit CAN identifier and decode 15+ common PGNs (heading, GPS, wind, engine, tanks, environment).
  • 📚NMEA 2000 PGN Lookup TableSearchable reference of 100+ NMEA 2000 PGNs with category, rate, fields, and CSV export.
  • 🛳️MMSI DecoderDecode 9-digit MMSIs into station type, MID country, and full structure breakdown.
  • ⚓Vessel IMO Number ValidatorValidate IMO numbers using the official checksum (or generate valid ones) with batch mode.
  • 📍GPS Coordinate ConverterAuto-detect DD / DDM / DMS, convert between all three plus UTM and MGRS, with a live map.
  • 🌐Great Circle Distance CalculatorHaversine distance, bearings, midpoint, and multi-waypoint routes with map and GPX export.
  • 🧲Bearing & Heading CalculatorTrue / magnetic / compass / back bearings between two points with a live compass rose.
  • 🌊Tide Height — Rule of TwelfthsEstimate tide heights and stream rates hour-by-hour from HW/LW values, with a curve chart.
  • 🧮CRC CalculatorCompute 8/16/32-bit CRCs (IBM, CCITT, MODBUS, XMODEM, MAXIM, Castagnoli) and NMEA XOR with step-by-step option.
  • 🎚️Bitmask & Bitfield Decoder8/16/32/64-bit BigInt-safe bitmask editor with clickable bits and named-field decoding (signed/enum).
  • 🛳️AIS Track → GeoJSON ExporterConvert multiple AIS NMEA sentences into a GeoJSON vessel track and visualize it on an interactive map.
  • 📡AIVDM / AIVDO Sentence CreatorBuild and encode complete AIVDM/AIVDO NMEA sentences for all major AIS message types.
  • 📏Maritime Speed & Unit ConverterLive converter for speed, distance, depth, pressure, temperature, and wind (with Beaufort scale).
Browse all Marine & Maritime tools →

SEO

10 tools

Tools for search, structured data, and on-page optimization.

  • 🏷️Meta Tag GeneratorBuild SEO meta tags with character counters and a Google snippet preview.
  • 📊Word & Character CounterLive word, character, sentence, paragraph and reading-time stats.
  • 🔑Password GeneratorGenerate strong random passwords with a strength meter.
  • 🔡Slug GeneratorTurn any title into a clean, URL-friendly slug.
  • 🤖robots.txt GeneratorCompose user-agent rules and a sitemap, then copy or download robots.txt.
  • 📣Open Graph Tag GeneratorBuild OG/Twitter meta tags and preview Facebook, X, and LinkedIn cards.
  • 🌍IP Address LookupGeolocate any IP with country, ISP, timezone, and an embedded map.
  • 🚦HTTP Status Code LookupSearch HTTP status codes by number or keyword, grouped by category.
  • 🗺️Sitemap GeneratorTurn a URL list into a valid XML sitemap with frequency and priority.
  • 📖Readability Score CheckerFlesch–Kincaid, Reading Ease, and Gunning Fog scores with suggestions.
Browse all SEO tools →