What is a Swagger editor?
A Swagger editor is a tool for editing and checking OpenAPI or Swagger API documentation before you publish it or share it with developers.
Free Tool
Swagger Editor
A Swagger editor is a free browser tool for editing, validating, and previewing OpenAPI or Swagger documentation before you share it with developers.
Paste YAML or JSON, catch missing core fields, inspect endpoints and schemas, then copy or download the cleaned API spec.
Editor
Paste Swagger or OpenAPI
Validation
Spec health
Format
YAML
Errors
0
Warnings
0
Core OpenAPI fields look ready to share.
Preview
Code Card Public API
Version 1.0.0 · OpenAPI 3.1.0
Paths
2
Operations
2
Schemas
2
Servers
https://api.codecard.devOperations
GET
/profiles/{username}GET
/profiles/{username}/statsSchemas
ProfileCodingStats
Share the work behind your API docs
Code Card turns Claude Code, Codex, and OpenClaw sessions into a public developer profile with activity graphs, token breakdowns, badges, and shareable cards.
FAQ
Swagger editor questions
Can I validate OpenAPI YAML and JSON?
Yes. This editor checks core OpenAPI fields in JSON and YAML, including the version, info block, paths, operations, responses, servers, and schemas.
Does this upload my API spec?
No. The editor runs in your browser, so pasted API docs stay local while you edit, preview, copy, or download the file.
What should every OpenAPI spec include?
Every OpenAPI spec should include an openapi or swagger version, info.title, info.version, paths, operations, and response definitions for each operation.
Is this a replacement for full API contract testing?
No. It is a quick browser validation and preview tool. Use it before sharing docs, then run your full schema and contract tests in CI.