CodDepot is a free collection of 41browser-based tools for software developers, SEO specialists, and the marine & maritime community. Everything is grouped into 3categories so you can find the right utility fast — no sign-up, no installation, and nothing you paste ever leaves your device. Browse a category below to see every tool it contains, along with what it covers and who it's for.
The Developer category bundles the everyday utilities that backend, frontend, and full-stack engineers reach for dozens of times a day. Format and validate JSON, decode and inspect JWTs, test regular expressions with live match highlighting, convert between Base64, hex, binary, and URL encodings, diff two blocks of text, and build cron expressions you can actually read back in plain English. Every tool runs entirely client-side, so you can safely paste API keys, tokens, config files, or production payloads — nothing is uploaded or logged. These tools are built for software developers, QA engineers, and DevOps practitioners who want a fast, no-friction alternative to scattered CLI snippets and ad-heavy sites, with no sign-up and no installation required.
The Marine & Maritime category serves marine engineers, vessel operators, navigators, and maritime software developers working with AIS, NMEA 0183, and NMEA 2000 data. Decode and encode AIS messages, parse NMEA 0183 sentences and verify their checksums, decode NMEA 2000 PGN frames, and browse a searchable PGN reference table. Identify vessels by decoding MMSI numbers and validating IMO checksums, convert GPS coordinates between DD, DMS, DDM, UTM, and MGRS, and calculate great-circle distance, bearings, and tidal heights. Export AIS tracks to GeoJSON, build AIVDM/AIVDO test sentences, and convert maritime units like knots, nautical miles, and fathoms. Built for people who understand bridge electronics and marine data formats, every tool runs locally in your browser so sensitive vessel and voyage data never leaves your device.
The SEO category is for content writers, marketers, and technical SEOs who optimize pages for search engines and social platforms. Generate clean meta titles and descriptions with live character counters and a Google SERP preview, build Open Graph and Twitter Card tags, create URL-friendly slugs, compose robots.txt files and XML sitemaps, and score the readability of your copy with Flesch–Kincaid and Gunning Fog metrics. You can also look up HTTP status codes, geolocate IP addresses, and count words, characters, and reading time as you type. Whether you are shipping a new landing page, auditing an existing site, or tuning content for better rankings, these browser-based tools help you get the on-page and structured-data details right — free, instant, and private.
CodDepot offers a free, growing library of browser-based utilities across three areas: developer tools (JSON, Base64, regex, JWT, diff, cron and more), SEO tools (meta tags, Open Graph, sitemaps, robots.txt, readability and slugs), and marine & maritime tools (AIS and NMEA decoders, MMSI/IMO validators, GPS and bearing calculators, and unit converters). Browse the categories above to see every tool in each.
Yes. Every tool on CodDepot is completely free, with no usage limits and no trial period. The site is supported by unobtrusive ads on tool pages, so you never have to pay or hit a paywall to format JSON, decode an AIS message, or generate a sitemap.
No account, sign-up, or login is required. Just open a tool and start using it. Because all processing happens locally in your browser, there is nothing to register and no data tied to a profile — your input never leaves your device.
New tools are added regularly based on what developers, SEOs, and the maritime community ask for most. Existing tools are also refined and expanded over time. Bookmark the categories page or check back periodically to see the latest additions to each category.