Free SQL Migration Tools — 2026
Most "free" SQL migration tools come with a catch — locked to one target, capped at a few queries, or free only if you're already paying for the target platform. Here's an honest matrix of what's actually free, what the limits are, and which tool wins for which use case.
| Metric | JarvisX Free Self-serve, 50 artifacts/month, no card | sqlglot (open source) Python library, deterministic transpilation | BigQuery Migration Service Free with GCP account, BigQuery-locked | SnowConvert (via Snowflake Program) Free for Snowflake customers, Snowflake-locked | ChatGPT (free tier) Generic LLM, no migration tooling |
|---|---|---|---|---|---|
| What's free | 50 artifacts/month forever | Everything — it's MIT-licensed | Translation API + Assessment, no extra cost on GCP | Often free if enrolled in Snowflake's Migration Program | Limited queries per day on free tier |
| Limit / catch | Free tier caps at 50 artifacts/month; bulk repos go to Starter ($79) or higher | Deterministic only; no LLM for the cases sqlglot can't handle (~30-40% of real SQL) | BigQuery target only; need a GCP account | Snowflake target only; gated through Snowflake sales relationship | Daily message cap; no bulk; no audit trail |
| Targets supported | BigQuery, Snowflake, Databricks, Redshift, PostgreSQL, Hive, Spark, DuckDB, SQL Server, Oracle | 20+ dialects (great coverage) | BigQuery only | Snowflake only | Any (it's an LLM) |
| Validation | All 13 layers run on every artifact (sqlglot + deterministic + LLM + auto-repair + semantic + confidence) | Syntax parsing only; no semantic scoring or confidence flags | Google's translation rules + schema mapping | Static analysis tuned for Snowflake | You read and verify each output |
| Bulk-repo support | Yes, up to the monthly cap; GitHub URL analyzer is free unlimited | You write the script | Yes via CLI | Yes | Manual, file by file |
| Best for | Trying out a real bulk migration before committing, exploring the platform | Developers who want to embed transpilation in their own pipeline and handle edge cases themselves | BigQuery-locked teams comfortable in GCP console | Snowflake-paying customers migrating exclusively to Snowflake | 1–5 files, ad-hoc, you check each result |
Category Overview
If you want a free path that actually works at bulk-repo scale with real validation, JarvisX Free is the most permissive — 50 artifacts/month forever, all targets supported, every conversion runs through the same 13 validation layers paying users get. If you're a developer comfortable writing your own pipeline, sqlglot is genuinely free and unbounded. If you're locked to BigQuery or Snowflake and your team lives in those consoles already, the platform-native free options (BQMS, SnowConvert) are good enough. ChatGPT is fine for the one-off file.