Duckdb Ref
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100 calls/day, no card, no spam. Built by one person, in public.
About DuckDB
Working with developer and design work no longer requires installing heavy desktop software — DuckDB runs entirely in your browser, instantly. The goal was to keep the path from "open the page" to "get the result" as short as possible. No mandatory account, no cookie wall, no upsell at every step. It is one of about a hundred developer tools that share the same philosophy: do one thing, do it well, get out of your way.
When you'd reach for DuckDB
You're cleaning up a folder of files that accumulated over a project and need to standardize them.
Designers, writers, and developers wrapping up deliverables.
Drop each file in, copy the output, move on.
You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.
Marketers and ops people whose primary tool is metered.
Stay productive without burning credits.
You're on a public or shared machine and don't want to leave traces of what you're working on.
Travelers, contractors, anyone working from a friend's computer.
Nothing is uploaded, nothing persists if you're not signed in.
You need to handle a one-off task right before a meeting and don't have time to install anything.
Anyone working remotely on a borrowed or restricted machine.
Open the page, get the result, paste it into your doc — under a minute.
Frequently asked about DuckDB
- Can I use DuckDB commercially?
- Yes. The output of DuckDB belongs entirely to you, with no licensing restrictions.
- Are my files uploaded to a server when I use DuckDB?
- DuckDB processes everything in your browser using local APIs. Your files never leave your device.
- Is DuckDB really free?
- Yes — DuckDB is free for unlimited personal use, with no account required and no watermark on the output.
- What browsers does DuckDB support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
- Do I need to create an account to use DuckDB?
- No. DuckDB works without any signup. We only ask for an email if you decide to subscribe to a paid plan.