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Fake Semver Changelog Generator
Writing placeholder release notes is tedious but necessary — an empty CHANGELOG.md looks unfinished, a parser test needs fixture data, and a semver tutorial without a concrete example is hard to follow. A fake semver changelog generator produces realistic multi-version Markdown changelogs with version numbers that follow semver rules. The `projectName` input embeds your package name in the header — use your actual npm or PyPI name to get output that needs no find-and-replace. The `versions` input generates 1 to 15 release entries working backward from today, randomly bumping MAJOR (when a breaking change is included), MINOR, or PATCH. Each block includes Features, Bug Fixes, Breaking Changes, and Chores sections with inclusion varying per version — useful for changelog parser testing. The formatting follows Keep a Changelog convention and renders correctly on GitHub and npm.
How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Enter your project name in the Project Name field, matching the package name you use on npm, PyPI, or your repo.
- Set the Number of Versions to how many release entries you want, between 1 and 10.
- Click Generate to produce a Markdown-formatted changelog with versioned sections and categorized entries.
- Copy the output and paste it into a CHANGELOG.md file in your project root, or use it as a documentation template.
- Replace the synthetic entry descriptions with your actual release notes before committing to a public repository.
Use Cases
- •Seeding a new npm package with a plausible CHANGELOG.md before its first public release
- •Creating Markdown fixtures for unit-testing a changelog parser or git-cliff pipeline
- •Populating a GitHub portfolio repo with a realistic multi-version project history
- •Teaching junior developers semver conventions using a concrete, readable example
- •Prototyping a CHANGELOG.md template before wiring up semantic-release or conventional-changelog
Tips
- →Generate with four or more versions to get a realistic mix of MAJOR, MINOR, and PATCH releases — single-version output won't show the version progression.
- →Use your exact npm or PyPI package name as the project name so the output is copy-paste ready without find-and-replace cleanup.
- →Pair the generated changelog with a fake README generator to build a complete, convincing demo repository in minutes.
- →When teaching semver, generate the same project twice with different version counts and compare how the version numbers evolve — it makes MAJOR vs MINOR decisions concrete.
- →If you're scaffolding a real project, use the generated entries as category prompts — keep the Added/Fixed/Breaking headers and rewrite only the bullet descriptions.
- →For CI pipeline testing, generate five or six different project names and feed the outputs as fixture files to cover varied changelog structures.
FAQ
how many versions should I generate for a realistic changelog
Four to six versions is a natural range — it gives you a mix of MAJOR, MINOR, and PATCH releases without feeling padded. If you're teaching changelog evolution or need a richer history for a portfolio project, generate eight or more to show a longer project arc with multiple breaking-change cycles.
can I use the generated changelog as a real changelog.md in my project
Use it as a structural scaffold, not finished copy. The formatting, version numbering, Keep a Changelog link, and section labels are production-ready. The entry descriptions are synthetic — swap them out for your actual release notes before committing to a public repository.
what is the difference between a minor and a patch release in semver
Under semantic versioning (MAJOR.MINOR.PATCH), a PATCH (1.2.3 → 1.2.4) is a backwards-compatible bug fix. A MINOR (1.2.3 → 1.3.0) adds new backwards-compatible functionality. A MAJOR (1.2.3 → 2.0.0) makes breaking changes — the generator only bumps MAJOR when a Breaking Changes section is present, keeping the version history internally consistent.
does the generator always include all four section types in every version
No — section inclusion is probabilistic. Bug Fixes appear in every version. Features appear roughly 70% of the time. Chores appear roughly 50% of the time. Breaking Changes appear roughly 25% of the time and only in versions after the first. This variable structure is useful for changelog parser tests, since real changelogs also vary in which sections appear per version.
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