Jenkins to GitHub Actions Migrator
Paste a Jenkinsfile, get a starter GitHub Actions workflow plus a manual-gap checklist. Free and private.
At a glance
Jenkins to GitHub Actions Migrator is a free, client-side tool that converts declarative Jenkinsfile pipelines into starter GitHub Actions workflow YAML. It maps stages, steps, triggers, and agents to workflow jobs, and flags shared libraries, credentials, and plugins that need manual migration. All processing is local: nothing is uploaded, and no account is required.
100% Client-Side Migration Blueprint
Your Jenkinsfile is parsed strictly in local browser memory. Zero uploads, zero servers, zero sign-up.
Fixed weights: stage 3, step 1, trigger 1, env var 0.5, shared-library gap 8, scripted gap 5, input gap 4, credentials gap 3, parallel gap 3, plugin gap 2, docker-agent gap 2, other gaps 1. Under 10 points is S, 10–24 is M, above 24 is L. A planning aid, not a quote.
Pin every uses: action to a version you trust, create repository secrets for each credentials gap, and translate when, parallel, and post blocks by hand before merging.
What maps automatically from Jenkins to GitHub Actions?
A Jenkinsfile is the text file that defines a Jenkins pipeline; a GitHub Actions workflow is the YAML file that defines automated jobs for a repository. This table is the exact rule set the converter above applies.
| Jenkins construct | GitHub Actions equivalent | Status |
|---|---|---|
| stage('Name') | job id | Automatic |
| sh 'cmd' | run: cmd | Automatic |
| checkout scm / git | actions/checkout | Automatic |
| archiveArtifacts | actions/upload-artifact | Automatic with note |
| cron trigger | on.schedule | Automatic |
| environment { } | env: | Automatic |
| credentials() | secrets.NAME | Manual gap |
| script { } / scripted syntax | hand-written run steps | Manual gap |
| shared libraries | composite actions | Manual gap |
| when / parallel / post / tools | if: / strategy.matrix / trailing steps / setup-* | Manual with note |
Why Use This Jenkins to GitHub Actions Migrator?
How to Use Jenkins to GitHub Actions Migrator
Paste Jenkinsfile
Paste a declarative Jenkinsfile into the input box or load the minimal example.
Review YAML and gaps
Review the generated starter workflow YAML and the flagged manual-gap checklist.
Copy and finish manually
Copy the YAML into .github/workflows/ and work through the checklist items.
Worked example: minimal Jenkinsfile to workflow
The engine parses the declarative stages and sh steps in browser memory, emits one workflow job with checkout plus run steps, and lists no gaps for this minimal pipeline.
pipeline { agent any; stages { stage('Build') { steps { sh 'npm ci'; sh 'npm test' } } } }
name: CI; on: [push]; jobs: { build: { runs-on: ubuntu-latest, steps: [checkout, run npm ci, run npm test] } }
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | JENKINSFILE, GROOVY-TEXT → YAML, CHECKLIST, ESTIMATE |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Modern browser with JavaScript and HTML5 APIs enabled. |
| Performance Constraints | Declarative-pipeline subset only; scripted pipelines, shared libraries, and CPS Groovy logic are flagged as manual gaps. Bounded by local device memory. |
100% Client-Side Privacy Guarantee
Pasted Jenkinsfiles are parsed 100% locally in your browser memory. No pipeline content, secrets, or credentials are ever sent to any server.
Frequently Asked Questions
Can I convert a Jenkinsfile to GitHub Actions automatically?
What parts of a Jenkins migration cannot be automated?
Is my Jenkinsfile data private?
How is the migration effort estimate calculated?
Methodology
The converter maps the Jenkins constructs shown on this page to GitHub Actions equivalents. Generated workflows are deterministic; review secrets, runners and triggers before production use.
Last updated .