Unitbox · Office #59,850

What it is

Calls itself “unit converter”.

• Calls itself: unit converter

“Free online unit converter and measurement reference”

Where it puts itself

Rules out “signup” and “upload”. Publishes a comparison page.

• Says it will not: signup · upload

“No signup required.”

“…no upload”

What it costs

A free tier, free forever.

• Free plan: free forever

“Free, MIT-licensed, no rate limit.”

Who it sells to

Sells to consumers. Made for construction, cooking and engineering. Available in 3 languages.

• Sells to: consumers
• Made for: construction · cooking · engineering
• Languages: English · 简体中文 · 繁體中文

“Free online unit converter and measurement reference”

“Construction Unit Converter Convert mm, cm, metres, inches, feet and yards for construction measurements.”

How it runs

A web app. Runs locally and works offline. Offers an API. Open source. AI is a side feature.

• Kind: web
• Runs where: on the device, offline
• API: yes
• Open source: yes
• AI role: a side feature

“Convert length, mass, temperature, data and more in your browser”

“Once loaded, the converter widget runs without a network roundtrip.”

What it works with

Names GitHub on its pages.

• Names: GitHub

“GitHub”

“Unitbox”

What it offers as proof

Live, no waitlist. Claims “1,040 conversion pairs”. Try it without signing up. Publishes docs and a blog.

• Number claimed: 1,040 conversion pairs
• Trial asks for: nothing

“No signup required.”

“12 categories · 111 units · 1,040 conversion pairs.”