This site does not provide a separate ZIP file or downloadable offline package. There is nothing to download manually: your browser automatically caches the website for offline use. Prepare this browser once, then follow the check below before relying on that cache.
1. Check the requirements
Use a current browser that supports service workers and allows storage for this site. Open the website over HTTPS, or use its localhost preview address. Opening an HTML file directly through file:// does not prepare the same offline workspace. Keep a working connection available for the first visit.
2. Prepare the browser cache
Open the site and look for the status near the bottom of the page, just above the footer. Keep the tab open until it reads “Offline ready · all 40 tools cached”. You do not need to visit every tool separately. Installing the site as an app is optional.
What the status means
- Preparing offline tools… — preparation has not yet been confirmed. Stay connected and keep the page open. If it does not finish, follow the troubleshooting steps below.
- Offline ready · all 40 tools cached — the browser has a completed-preparation marker. This is not a fresh check of every cached file. Confirm access with the offline test below.
- Offline cache incomplete — you are offline and the completed-preparation marker is missing. Reconnect, reload and prepare again.
- Offline cache unavailable or Offline caching unavailable — the page could not initialize offline access, or the browser does not provide the required support. Check site storage permissions, browser support and the site address.
3. Test before you need it
- Wait for the Offline ready status while connected.
- Disconnect your device from the network, then reload this page normally.
- Open All tools and choose another tool, such as JSON Pointer explorer.
- Select Load example, then Run tool. Compare the output with Expected result.
- If a page or tool fails to open, reconnect and complete the troubleshooting steps. Prepare and test again before relying on offline use.
Use the same device, browser profile and site address when you return. A different browser, private window, domain or port needs its own preparation. Bookmark the working address so you can find it again.
4. Work with your own input
Paste text or choose a local file, then select Run tool. Processing happens in your browser. Each tool includes instructions, a worked example and its input limits. Review generated code, schemas and SQL before using them in a project.
Copy result uses your browser’s clipboard. If clipboard access fails, select the output and copy it manually. Download text saves the result on your device. A successful empty-text result can be copied or downloaded as a zero-byte file. Clear removes visible inputs and output; it does not erase your clipboard or downloaded files.
5. Know what is available offline
The browser’s offline cache includes all 40 tools, their instructions, the local developer tutorials, this guide, the FAQ and bundled images, fonts and calculation code. External reference websites and remote browser-translation services are not included. Follow an external link when you have a connection, or use the original English content offline.
The application caches website pages and assets, not your tool inputs or results. It saves your theme preference locally. Your browser may restore forms or tabs according to its settings. Copied text and downloaded files can remain independently of the tab. Read the privacy details for more information.
Updates and recovery
Reconnect to receive updates. A new version prepares a complete cache before activation; reload after the update activates. Offline visits cannot download a newer version. The Offline ready label alone does not identify which version you have.
If preparation or offline access fails
- Check the connection and address. Reconnect and make sure the website opens normally at the same address you prepared. For localhost previews, keep the local preview server running during preparation.
- Reload and allow preparation to finish. Keep the page open and check the status above the footer. Then repeat the offline test.
- Check browser storage. Allow site data, check available device space and try a regular browser window. Private modes, storage limits and browser cleanup can restrict or remove the browser cache.
- If an older page remains, reconnect and reload. Allow the new cache to finish preparing, then reload again to use the activated update.
- Reset site data only as a last step. First save any result you need. In your browser’s settings, find this site’s stored data and remove it. This deletes the browser’s offline cache and theme preference; do not do it while depending on offline access. Reopen the site online, prepare again and repeat the offline test.
Still need help? See frequently asked questions or how to report a reproducible issue. Use a small non-sensitive example and include your browser version, the status shown and the step that failed.