AsyncAPI Studio

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Freedom report

One barScore 5.0

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely4 of 6 device platforms
DocumentedThinly documented

AsyncAPI Studio is ranked #23 of 26 in API design tools on Freedom251. It runs on Linux, macOS, Web, Windows.

Compared on API design tools

AsyncAPI support: Yes

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The record

Purpose: AsyncAPI Studio is a place to develop AsyncAPI documents, validate them, convert them to the latest version, preview documentation, and visualize event flows.
Document formats: AsyncAPI documents can be written in JSON or YAML.
Remote imports: Studio can import AsyncAPI files from remote URLs and resolve relative $ref references against the remote URL.
Local references: Studio can resolve local file references after the user grants access to the folder containing the AsyncAPI files and schemas.
Schema formats: The README lists Avro .avsc, JSON Schema .json, and YAML .yaml as supported referenced schema formats.
Schema editing: Studio can edit the main AsyncAPI document and referenced schema files, with changes reflected when the parser re-validates.
Saving files: Files opened from a folder can be saved to their original location, while other files can be exported to a selected local file.
Additional viewers: Studio includes a Markdown preview with Mermaid diagrams and an Avro schema viewer that generates Mermaid diagrams.
Browser compatibility: The README says local folder access is supported in Chrome, Edge, and Brave, and is not supported in Firefox or Safari.
Folder access security: Folder access is granted for the current session only and is not persisted, so it must be granted again each time the application is opened.
CLI integration: The AsyncAPI CLI can start a local Studio instance with `asyncapi start studio [SPEC-FILE]`.
Download size and prerequisite: The CLI installation guide says Studio is downloaded on demand at approximately 450 MB and that npm must be available on PATH for that installation.
License and governance: The AsyncAPI Initiative describes itself as an Apache License 2.0 project under the Linux Foundation with an open governance model.

Where it ranks on Freedom251

Best API Design Tools in 2026#23 of 26

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Sources

asyncapi.com/docs/tutorials/studio-document-validati· checked 4 Oct 2026
github.com/asyncapi/studio· checked 4 Oct 2026
asyncapi.com/docs/tools/cli/usage· checked 4 Oct 2026
asyncapi.com/docs/tools/cli/installation· checked 4 Oct 2026
asyncapi.com/about· checked 4 Oct 2026