Developer tools

Everyday utilities for developers and technical work

One catalog for JSON (format, validate, convert), encoding, images, QR codes, color, crypto, regex, Unix timestamps, and related tasks—organized like a toolkit, not a list of one-off pages. Most work runs in your browser; server-side or generative AI is only where a tool says so.

Official site toolcore.dev

Below, use category tabs and search to open a tool. For per-page execution notes, optional sign-in shortcuts, and automation (manifests, URL prefill), see About.

If Toolcore saves you time, you can support ongoing updates—optional, and always appreciated.

Browse tools

Start with a category tab for a focused list—the All tab shows a preview first so the page stays easy to scan.

Common use cases

  • Scan the catalog by category when you know the task (JSON formatting, media, encoding, timestamps) but not the exact route name.
  • Check each card’s execution label—browser, server, or generative AI—before pasting sensitive payloads.
  • Open AI agents & LLM integration or /agent-tools.json when you want assistants to hand off work with prefilled URLs.

Common mistakes to avoid

  • Assuming every tool is offline-only

    Some routes use the server or generative AI when configured. Read the label on the card and the tool page before you paste secrets.

  • Treating the home list as the full sitemap

    Hubs (JSON, Color, AI) and linked subpages may include additional URLs—use navigation or search when you need a niche transform.

FAQ

What kinds of free online tools are on Toolcore?

A broad developer toolkit: JSON format and validation, encodings (for example Base64), images and QR codes, color conversion, Unix timestamps, regex, hashing, compression, JWT decode, and more—organized in one catalog with clear labels for browser vs server vs AI-assisted routes.

Do I need an account?

No. Tools work without sign-in. An optional account can pin shortcuts and favorites on the home catalog.

Where is privacy explained?

See the Privacy Policy for cookies, optional sign-in, ads, and how browser-first tools are designed.