Built for data engineers, by data engineers

Smart tools for
data workflows.

Private, instant, no-sign-up utilities. Validate, transform, and explore your data right in the browser.

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100% client-side • No data leaves your browser • Free forever

All tools

Everything you need for daily data work — right in your browser.

Beta

JSON Validator

Validate, format, repair, and explore JSON with live validation and tree view.

JSONSchemaClient-side
Launch tool
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YAML Validator

Validate, format, and explore YAML configs with live parsing and tree view.

YAMLConfigClient-side
Launch tool
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GCloud Command Explorer

Interactively discover and build gcloud commands with live argument suggestions — 100% client-side.

GCPCLIAutocomplete
Launch tool
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JSON ↔ YAML

Instantly convert between JSON and YAML with perfect fidelity.

JSONYAMLConvert
Launch tool
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CSV Explorer

Profile messy CSVs, detect quality issues, and generate BigQuery + dbt schemas.

CSVDataClient-side
Launch tool
Beta

SQL Formatter

Pretty-print and lint SQL queries with dbt / BigQuery dialect support and customizable style.

SQLdbtBigQuery
Launch tool
New tools added regularly. Missing something? Let us know.

Why these tools exist

Private by default

All validation, formatting, and transforms happen in your browser. Nothing is uploaded or logged.

Instant feedback

No waiting for a backend, no sign-up, no rate limits. Open a tool and start working immediately.

Built by practitioners

Every utility solves a real friction the author hits while writing pipelines, dbt models, and Airflow DAGs.

Roadmap

What we’re working on next

Q2 2025
JSON & YAML validators with schema support and sample generators
Q2 2025
CSV/TSV explorer + Parquet preview (client-side)
Now
GCloud Command Explorer + JSON ↔ YAML converter + SQL Formatter
Ongoing
More one-off utilities requested by the community

About Smathr

Smathr is a personal collection of lightweight, high-quality tools I wish I had while doing data work. The goal is simple: remove the tiny frictions that slow engineers down every day.

Built in public. Feedback and tool ideas are always welcome — just email or open an issue.

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