Portable tools / Local preview
Your expertise.
A tool they can keep.
Adapt a calculation, prove the expected results, and give your client one HTML file that works offline.
Account storage
Account integration preview. Local history remains on this device. Account actions require the account service.
Create an account or recover access (opens a new tab)
Loading replaces your draft. Saving a loaded historical version creates a new revision; it does not change the old one. Archive frees an active slot and keeps all versions.
Account storage is disconnected. Your draft stays local until you choose to save it to your account.
Start with a working model
Replacing or restoring a draft discards unsaved edits. Save a version or export before closing.
Your saved versions
Reading local history.
Saved only in this browser on this device. Clearing site data removes this history. Export important tools; account sync and cloud backup are not active.