Focused Tool · Apache 2.0 · Single Binary · Developer Tools

Self-hosted data transformation API

POST raw data in one format, get it back in another. JSON to CSV, XML to JSON, Markdown to HTML. No cloud function, no Lambda cold start.

Install Smelter Free Complete — all 164+ tools — 14-day free trial

Replaces

Replaces AWS Lambda (transforms) ($0.0000002/request).

POST raw data in one format, get it back in another. JSON to CSV, XML to JSON, Markdown to HTML. No cloud function, no Lambda cold start. Your data lives in a SQLite file on your disk that you can back up by copying a folder, move to another machine, or query directly with any SQLite tool. The binary keeps running if Stockyard disappears tomorrow, because it is Apache 2.0 and you have a copy.

Quickstart

Running in under a minute.

Stockyard runs on desktops and laptops. To install, open this page on your Mac, Windows, or Linux computer.

Download for Mac macOS 11+ · Universal

Download for Windows Windows 10/11 · 64-bit

Download for Linux .tar.gz · Any distro

After install, open http://localhost:10040 in your browser.

Advanced: install via terminal instead

curl -fsSL https://stockyard.dev/install.sh | sh -s -- --tool smelter

Single binary. Embedded SQLite. No Docker. No database. No dependencies.

Pricing

14 days free. Pro when you need it.

Free

forever

1,000 transforms/mo
Single binary, embedded SQLite
Apache 2.0 — modify freely

Pro

$7.99

per month

Unlimited transforms, custom pipelines, batch mode, webhook triggers
License key, no cloud dependency
Email support

After you upgrade

License key by email. One env var.

Your license key arrives by email within 5 minutes of checkout. Set it as an environment variable and restart the binary.

export STOCKYARD_LICENSE_KEY=SY-xxxxxxxxxxxxxxxxxxxx
./smelter

No cloud connectivity required. The binary validates the key offline with Ed25519 signatures.