Five free tools. No signup, no key, nothing leaves your browser.

Why these are free and ungated

None of these need a server, so none of them cost us anything to host, and none of them ask for an email address before you can use them. If a free tool is useful enough, people link to it from a "best free tools" roundup in a way they never link to a blog post, and that's a fair trade for giving something away.

Each tool is built for a narrow, specific job rather than trying to be a general-purpose utility. The MAR calculator only estimates Fivetran's own pricing model, using a dated snapshot of their published tiers, not a live API call. The CSV-to-CREATE-TABLE generator sniffs column types from the data you paste (int, float, date, string) and quotes identifiers correctly for whichever dialect you pick, so the statement runs without hand-editing. The cron builder assumes you're scheduling a data job specifically, so its presets match patterns like "every 15 minutes" or "every weekday at 6 AM" rather than generic system cron use cases.

The five tools

• Fivetran MAR Calculator — Work out what Fivetran's monthly-active-rows pricing actually charges you for a stated row count and table count, and see the equivalent flat-fee QueryFlow cost next to it.
• CSV to CREATE TABLE — Paste a CSV or drop a file and get back a generated CREATE TABLE statement with inferred column types, quoted correctly for Snowflake, BigQuery, Postgres, Redshift, or Databricks.
• Cron Builder for Data Jobs — Build a cron expression with plain-language pickers instead of memorizing field order, aimed at scheduling SQL jobs rather than generic system tasks.
• SQL Formatter — Paste raw SQL and get it formatted, client-side, no key required. The free layer of what the Ask panel's AI cleanup does with a model.
• Watch This Recipes — Twenty ready-made alert queries, one per warehouse dialect, for row count spikes, null spikes, schema drift, and freshness lag. Copy-paste ready.

The Watch This recipes gallery is the odd one out on this list, it is not a calculator but a set of twenty ready-made alert queries, one per warehouse dialect, that you can run in QueryFlow or adapt for any SQL client with its own scheduling story. Each recipe watches for one specific condition: a row count spike, an unexpected null spike in a column that should never be null, a schema change on a source table, or a freshness lag where data stopped arriving on time.

Where these fit next to the app

The SQL formatter is deliberately the free, rules-based version of a small piece of what the paid Ask panel does with a model you bring your own key for. The CSV-to-CREATE-TABLE generator and cron builder solve problems people hit constantly whether or not they ever open QueryFlow. None of them collect anything, and none of them require the app.