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You can move Postman collections and environments into Insomnia by exporting them as JSON and importing them into an Insomnia project. The core requests usually transfer, but a successful import is only the start: reconnect variables, check authentication, repair scripts, and plan separately for mocks, monitors, team settings, and CI jobs.
The safest approach is to migrate one representative collection first, test it against Postman, and then move the rest. Keep the original exports as a rollback copy, and treat them as sensitive if they contain tokens or other private data.
Decide what you are migrating
Moving an API client is not the same as moving the whole API-development process. Postman collections and environments have a supported import path, but workspace administration, scheduled runs, mock servers, integrations, and automation need their own migration plan.
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Insomnia organizes work in projects, which can contain requests, environments, and folders. A request collection is suited to sending and testing requests; a design document can hold an API specification, generated requests, and tests. Decide whether each Postman workspace should become an Insomnia project, and whether your source of truth will be a hosted workspace, Git, an exported file, or an API specification. Insomnia explains these terms in its terminology guide.
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- For an individual moving selected APIs: export specific collections and their environments.
- For a complete personal move: use Postman’s bulk data export where available, preserving the archive.
- For an organization with many workspaces: assess Insomnia’s bulk-import workflow; it has additional setup requirements.
Before choosing, inventory the features you rely on. Include collection and folder variables, global variables, authentication inheritance, scripts and tests, request chaining, data files, certificates, mocks, monitors, CI commands, integrations, and team permissions. Mark which variables contain secrets.
Back up and export Postman data
Keep an unchanged copy of every export for rollback. Do not commit exports containing live tokens, passwords, client secrets, or personal test data to a public repository. If you need files for troubleshooting or Git, make a separate sanitized copy.
Export selected collections and environments
- In Postman, open Collections, open a collection’s options menu, and choose More → Export collection. Choose the available JSON export option and save the file.
- Open Environments, use the environment’s options menu, and choose Export.
- If the collection depends on global variables, export those separately from the variables pane.
- Repeat only for the collections and environments you intend to move. Keep the original files unchanged.
Postman documents collection, environment, and global-variable exports in its exporting data guide. A bulk export is useful for a complete personal migration: it contains data from workspaces associated with the account and provides collection and environment files in a downloaded archive. The download link is time-limited, so store the archive securely.
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Choose an export route
| Route | Best for | What to watch |
|---|---|---|
| Separate collection and environment JSON files | Selected APIs, deliberate project mapping, or review before import | Export global variables too if requests depend on them. |
| Postman bulk data export | A complete personal migration | Retain the archive securely; its download link expires. |
| Insomnia bulk workflow | Organizations with many Postman workspaces | Requires a Postman API key and organization-level enablement; see the bulk section below. |
Import into an Insomnia project
- In Insomnia, click the + button in the left panel and create a project. Choose the storage or synchronization mode that fits your team.
- Open the project and choose Import. Select the Postman collection JSON file. Insomnia documents support for Postman Collection v2.0 and v2.1.
- Add the relevant environment JSON files. Depending on the workflow, Insomnia can import a file, folder, URL, or clipboard input.
- Click Scan and review the resources Insomnia detected. Then click Import. Repeat for other collections.
Insomnia’s import and export documentation lists supported formats, including Postman v2.0 and v2.1, OpenAPI and Swagger, HAR, cURL, WSDL, and Insomnia JSON. The scan step is a chance to catch an unexpected or incomplete import before bringing it into the project.
Reconnect environments and variables
Imported values do not guarantee that a collection is using the right environment. Open the collection, select Base Environment or the collection’s environment selector, and choose the imported environment. Then inspect the environment in JSON view: nested values may not be fully visible in the table view. Confirm the base URL, IDs, tokens, and nested values, and re-enter any secrets that were omitted.
A Postman global variable may have been available across many collections. In Insomnia, global-environment values may need to be imported and selected as the base environment for each collection. Collection variables are mapped to Insomnia’s baseEnvironment; check the resulting scope rather than assuming the mapping matches your old setup. The Postman-to-Insomnia migration guide describes the global-environment selection requirement.
| Postman behavior | What to verify in Insomnia |
|---|---|
| Global variable shared by collections | Import or recreate it, then select the appropriate base environment for each collection. |
| Collection variable | Check its mapped value and scope in the base environment. |
| Secret environment value | Re-enter it securely if it was not included in the export. |
| Folder-specific override | Confirm the folder structure and inheritance produce the intended value. |
| Runtime value set by a script | Rewrite and test the script using Insomnia’s scripting behavior. |
If a request fails, inspect the resolved request as well as the environment editor. A missing or incorrectly scoped value can leave a request looking intact while producing a wrong URL or authorization header.
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Import success confirms that Insomnia recognized resources; it does not prove that a request behaves the same way. For each representative collection, compare the outgoing request and response in both clients before migrating the rest.
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- Start with a low-risk, unauthenticated GET request, then test a request using the base URL variable.
- Check a request using the authentication types your collection relies on, such as bearer, basic, API-key, OAuth, or custom authentication.
- Test path and query variables, a JSON body, and form-data or multipart data if used.
- Run a request that depends on a previous response, and a negative test that should return an expected error.
- Compare the resolved URL, method, query encoding, headers, cookies, authentication, body encoding, redirects, TLS or certificates, response status and body, and variable resolution.
For a 401 or 403, check the selected environment, whether the token was exported, whether a global variable was mapped, whether OAuth needs reauthorization, and whether the variable scope or syntax changed. Inspect the actual outgoing authorization header and re-enter missing credentials.
Repair and verify scripts
Insomnia says most Postman pre-request and post-response scripts can be converted, and scripts exported from Postman v2.0 and v2.1 can work after import. That is not a guarantee of source compatibility. Scripts may contain authentication logic, response extraction, request construction, or assertions; treat them as application code and test their behavior.
Documented limitations include unsupported direct equivalents for insomnia.globals, deprecated interfaces such as postman.setEnvironmentVariable, limits in some tests assignment syntax and operations on request and data, expressions without semicolons, and some object destructuring or computed access involving pm variables. See the current Insomnia scripting documentation for compatibility details.
- Open a script-enabled request and run it once.
- Read the first runtime error before editing; it often points to the incompatible API or operation.
- Replace deprecated Postman APIs and make global-state assumptions explicit through the intended Insomnia environment scope.
- Run the request again and verify both its HTTP result and its assertion outcome.
- Test missing, malformed, and expired values as well as the successful case.
Do not count a script as migrated merely because it appears in Insomnia or imports without an error. Confirm that its side effects, extracted values, and tests still produce the expected results.
What does not migrate as a collection
| Postman feature | Migration status | Action |
|---|---|---|
| Collections and folder hierarchy | Supported through Postman v2.0/v2.1 import | Review hierarchy and request behavior after import. |
| Environments and variables | Importable, but scope and selection need review | Connect the correct base environment and re-enter missing secrets. |
| Pre-request and post-response scripts | Usually converted, with documented incompatibilities | Run, repair, and test each script. |
| Authentication and request bodies | Request data may import | Verify actual headers, token behavior, form encoding, and multipart data. |
| Request chaining | Requires behavioral testing | Check response extraction and downstream variable use. |
| Mock servers | Not imported | Recreate routes and responses manually or adopt a separate mock workflow. |
| Monitors and scheduled runs | Not provided by importing a collection | Choose and validate a replacement in Insomnia or CI. |
| Newman or Postman CLI jobs | Not automatically migrated | Rebuild and compare automation separately. |
| Team permissions, workspace roles, billing, and governance | Not request data | Recreate access and policy settings in the destination system. |
| Integrations, saved response metadata, certificates, and local machine settings | Review individually or configure manually | Audit whether each is needed and set it up on workstations or CI runners. |
Insomnia explicitly states that Postman mock servers must be recreated manually in its migration guide. Do not assume that monitors, collection-runner iteration data, integrations, permissions, or secret-handling behavior move just because the requests do.
Choose between a Postman collection and OpenAPI import
If your Postman requests were generated from an authoritative OpenAPI specification, importing the specification may be a cleaner route to an Insomnia design document. Insomnia supports OpenAPI 3.0, OpenAPI 3.1, Swagger, and Postman formats in its import workflow; see its API-spec import guide and API specifications documentation.
- Prefer the specification when it is the API contract, the Postman requests were generated from it, and custom scripts or examples are not essential.
- Prefer the Postman collection when hand-written examples, custom authentication, scripts, chaining, or the collection itself are the practical source of truth.
Migrate many workspaces as a team
For a handful of collections, selective file imports are easier to review. For organization-wide migration, Insomnia documents a bulk workflow that uses a Postman API key and the organize-postman-export package. Its organization feature is not enabled by default; request enablement from an Insomnia Customer Success Manager.
export POSTMAN_API_KEY='your-postman-api-key'
npx organize-postman-export exportThe tool organizes Postman collections, environments, and workspace data into directories for import as Insomnia projects. The documented project import path is Preferences → Data → Import projects. The bulk workflow can map Postman workspaces to Insomnia projects, but it may create Cloud Sync projects by default. If you change a project to Git Sync, the documentation says you must create and link a repository for each project manually. See the bulk migration guide for prerequisites and known transformation limits.
Bulk import is a poor fit if workspaces are substantially stale or duplicated, contain secrets that need cleansing, or need a different project structure. Public Postman workspaces also need special handling for global variables. In those cases, curate exports and create destination projects deliberately rather than copying the old structure wholesale.
Move CI and scheduled automation separately
Identify every pipeline and scheduled job that runs a Postman collection. Preserve the collection and environment used by CI, repair script and secret handling, then run the Insomnia equivalent in a separate stage. Insomnia documents these Inso CLI examples:
inso run collection "<Collection Name>" --env "<Environment Name>"
inso run test "<Design Document Name>" --env "<Environment Name>"
inso export spec "<Design Document Name>" --output spec.yamlFor collection execution and other current options, consult the Insomnia collections documentation and run the installed Inso CLI version’s help command before adapting commands for a production pipeline. CLI syntax and supported flags can change. Compare exit codes, assertions, reports, and artifacts in parallel before switching production CI; collection import alone does not replace Newman or Postman CLI jobs.
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Use one row per collection in a migration tracker. Record import status, environment connection, authentication verification, script repairs, passing tests, recreated mocks, and the CI replacement decision. Before retiring Postman, work through these checks:
- Requests: methods, resolved URLs, path and query values, headers, body types, multipart fields and file paths, cookies, TLS, certificates, redirects, and expected responses.
- Authentication: bearer and API-key placement, OAuth refresh, basic-auth exposure, client certificates, and safe failure for missing or expired credentials.
- Environments: development, staging, and production separation; selected environment; global values; nested values; re-entered secrets; and absence of production credentials in test exports.
- Scripts and tests: pre-request behavior, response extraction, chained variables, failing assertions on incorrect responses, and equivalent local and CI results.
- Operations: replacement mocks and monitors, team access, deliberate cloud or Git synchronization, working backups, and restored data.
Move only when the features your team actually uses have been accounted for. For API-platform teams, access controls, monitoring, specifications, and governance can matter as much as request fidelity. For an OpenAPI-first team, the specification may be the better artifact to migrate. For a team heavily dependent on Postman automation or mocks, plan replacements before decommissioning the old workflow.
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