Connection Doctor tells you why a connection is not working, instead of showing you an HTTP status. • New Connection Doctor, on the stethoscope button above the table list or by right-clicking a connection. It checks whether the token is in the Keychain, whether it can read this database, and whether it carries the permissions behind editing, exporting, restoring, and the analytics Cost & Budget needs, then names the permission you are missing. Free. • Every check is a read. Capability is inferred from calls a token without the permission is refused for, so nothing is written, created, or mutated to find out whether it could be, and no result is ever stored. • Local SQLite connections get their own checks, including the security-scoped bookmark that stops resolving once the file moves, which is how a local connection quietly breaks. • New Advisor tab in Cost & Budget (Pro), ranking the query shapes running against a database by the rows they read, since rows read is what D1 bills on. Each carries its run count, average time, estimated cost, and rows returned per row read, plus a suggestion where the numbers clearly support one, such as an index for a statement that scans thousands of rows to return twenty. • The advice is local arithmetic, not a language model, and nothing is sent anywhere. Cloudflare strips bound parameters before recording a statement, so no value from your data appears in that list. • The Advisor's findings copy out as Markdown, ready to hand to a coding agent, with each statement's full SQL rather than the pane's shortened preview. The report says up front that these are heuristics computed from row counts, which have never seen your schema, so an agent treats them as candidates to check rather than instructions to follow. Any row's full SQL also expands and copies on its own. • Connections now follow you between Macs. The list syncs through iCloud, and only what identifies a database travels: its name, account ID, database ID, and database name. API tokens sync separately through iCloud Keychain, which is end-to-end encrypted and readable only by your own devices. Local SQLite connections never sync, since their bookmark cannot resolve inside another device's sandbox. Both are independent switches in Settings, on by default. • D1 queries now show which datacenter answered them, in the same strip as execution time and rows read: the colo, whether the primary or a replica served it, and the region when it was a replica. • An expired token, a token missing a permission, and a malformed statement are now three different errors instead of one string. They previously all arrived as a raw HTTP status and response body, which sent people hunting through their SQL for a bug that was never there. • Importing a Wrangler project is easier to find. It is now an option in the New Connection sheet and a button on the empty connections list, not only an item tucked inside the toolbar "+" menu.

Know what a D1 database costs before the invoice arrives. • New Cost & Budget inspector, on the $ button above the table list. Month-to-date cost priced from Cloudflare's published D1 rate card, across rows read, rows written, and stored bytes, with the billable part separated from what your plan already covers. • Seeing what you already owe is free, including the per-day table of rows read, rows written, and queries. • The sidebar prices each remote database in place, so its month-to-date cost is visible without opening anything. It appears once you open that database's table list. Free. • Month-end projection and a monthly budget per database, with a bar that turns amber at 80% of it and red once the projection goes past. The projection also sits beside the sidebar figure. Leave the budget blank and it just shows the cost without judging it. (Pro) • On Workers Free, which cuts you off rather than billing you, the dollar figures are replaced by how close today's usage is to the daily row limits and the 5 GB storage cap. • Usage is read from Cloudflare's analytics API rather than from what you happen to have run here, so it counts your Workers too. This needs the connection's API token to carry the "Account Analytics: Read" permission; a token that can only run queries gets a panel explaining exactly that, with a link to the Cloudflare token page. • Queries now record rows written alongside rows read, which D1 reports and the app previously discarded. • The query editor now shows the same cost strip the data grid does: execution time, network overhead, and rows read for the statement you just ran.

Never lose the query that fixed production. • New Query Notebook, beside the editor. Save any statement as a named snippet and load it back with a click. (Pro) • Every statement you run is kept per connection, the ones that failed included, because that's usually the one you go looking for. Each row shows LOCAL or REMOTE, READ or WRITE, how long it took, and how many rows it read. (Pro) • Pin any history row to keep it as a snippet. • Loading a statement from the Notebook fills the editor, it never runs it, so the remote write guard still stands between you and a destructive statement. • Your history stays on this Mac and is never synced. Delete any row, clear a connection's history, or switch recording off in Settings. Nothing is recorded unless Pro is unlocked. • An unavailable Keychain now reports a real error instead of looking like a missing API token.

Remote database? Export before you write. • Every connection now carries a LOCAL or REMOTE badge. A write to Cloudflare D1 lands in production immediately and can't be undone without Time Travel. Now the app says so before you run it, not after. • Destructive writes to a remote database stop and ask you to type the database name to confirm, and offer to take a snapshot first. Covers write queries, row deletion, and column deletion. Local SQLite writes are untouched: the friction is aimed only where it's earned. • New "Export Snapshot" backs up a whole database before you touch it. D1 uses Cloudflare's official export, a production-fidelity .sql dump that preserves BLOBs byte-for-byte and captures a recovery bookmark. Local SQLite uses VACUUM INTO. (Pro) • New Recovery Center window keeps a durable history of every backup and restore (database, date, recovery bookmark, destination, size, and status), with one-click Reveal in Finder. (Pro) • Time Travel restore rolls a D1 database back to any point in Cloudflare's retention window. It always takes a mandatory pre-restore backup first and offers one-click undo, so a restore is never a point of no return. (Pro) • Export Snapshot, Restore, and Recovery Center now live in a new Database menu and the sidebar's connection context menu, so whole-database actions sit at the database level. • Wrangler import now labels each binding with the environment it's declared under, so DB (staging) and DB (production) import as two clearly named connections instead of colliding. Recovery Center, export, restore, and all write features are Pro. D1 export requires the connection's API token to have D1 export permission.

A reliability-focused release. • Cloudflare D1 requests now time out cleanly (30s per request, 60s per resource) instead of hanging forever on a stuck endpoint. • SQLite databases in WAL journal mode now ask before being converted to rollback mode — the app no longer silently rewrites bytes on disk. Read access is unchanged. • A corrupt connections file is backed up and surfaced as a banner with a "Show backup in Finder" button, instead of being silently overwritten. • Faster sorting and scrolling in large data grids. • Connection storage migrated from SwiftD1/ to D1Explorer/ automatically on first launch.

D1Explorer is now free to download. Connect unlimited accounts and browse your Cloudflare D1 and local SQLite databases — list tables, run SELECT queries, inspect schema, and import Wrangler projects, with no trial timer and no account. Unlock D1Explorer Pro with a one-time in-app purchase to enable all write features: insert, update, and delete rows, inline cell editing, create, rename, and drop tables, add, remove, and alter columns, and DML/DDL execution in the query editor. Everyone who purchased D1Explorer before this release gets Pro automatically on first launch — no restore required, no second payment.

One-click import for Cloudflare Wrangler projects: point D1Explorer at any Worker repo and it discovers every local D1 database under .wrangler/state, names each one from your wrangler.toml bindings, and adds them as connections in a single step. Plus several row-editing fixes, Cmd+R refresh, and fresh app icons.