voluptuous-serialize
Convert voluptuous schemas to dictionaries
Decision gist · record as of 2026-08-14
Yes. Low install friction, active maintenance, no vulnerabilities, and a clear single-purpose design make this a safe dependency. Install it if you need to expose Voluptuous schema metadata as JSON or dictionaries—particularly for API documentation, form generation, or cross-service schema sharing. Skip it if your schemas never leave Python or you don't use Voluptuous.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later.
- Low friction: pure Python wheel with a single runtime dependency (voluptuous).
- Actively maintained with a recent release (2025-08-17) and no known vulnerabilities.
License · maintenance · safety
Apache-2.0 (permissive) — Apache-2.0 permissive license allows use in most commercial and open-source projects without significant restrictions.
last release 2025-08-17 (362 days) · last repo commit 2026-08-01 · 13 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 743,559 downloads/mo, #5,176 on PyPI
Alternatives
Verify before relying
pip install voluptuous-serialize
import voluptuous as vol
from voluptuous_serialize import convert
schema = vol.Schema({vol.Required("name"): str})
result = convert(schema)- Whether custom serializers can handle all validator types beyond the documented examples.
- Performance characteristics when converting large or deeply nested schemas.
What it is and what it does
Voluptuous-serialize bridges the gap between Python validation schemas and data interchange formats by converting Voluptuous schema definitions into JSON-compatible structures. It takes a Voluptuous Schema object—which defines validation rules like required fields, type coercion, and constraints—and produces an ordered list of field descriptors with type information, constraints, and metadata that can be serialized to JSON or inspected programmatically.
The package is designed for scenarios where you need to expose schema metadata outside of Python: documenting APIs, generating UI forms, or transmitting validation rules to other systems. It handles standard Voluptuous validators (Required, Optional, All, Coerce, Range, Length) and provides a custom serializer hook for extending support to domain-specific validators. The conversion preserves constraint information like minimum/maximum values and string length bounds.
Use it for
- Generate API documentation from Voluptuous schemas by converting them to JSON for display or OpenAPI generation.
- Build dynamic form generators that read schema metadata to create UI fields with appropriate constraints.
- Export validation rules to frontend applications or microservices that need to understand schema structure.
- Inspect and debug schema definitions by converting them to readable dictionaries for logging or testing.
- Implement schema versioning systems that serialize schemas for storage or transmission between services.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
Low install friction, active maintenance, no vulnerabilities, and a clear single-purpose design make this a safe dependency. Install it if you need to expose Voluptuous schema metadata as JSON or dictionaries—particularly for API documentation, form generation, or cross-service schema sharing. Skip it if your schemas never leave Python or you don't use Voluptuous.
Install
voluptuous-serialize on PyPI
Before you install
Low friction: pure Python wheel with a single runtime dependency (voluptuous). Actively maintained with a recent release (2025-08-17) and no known vulnerabilities.
Requires Python 3.9 or later.
License in practice
Apache-2.0 permissive license allows use in most commercial and open-source projects without significant restrictions.
Quickstart
pip install voluptuous-serialize
import voluptuous as vol
from voluptuous_serialize import convert
schema = vol.Schema({vol.Required("name"): str})
result = convert(schema)Verify before relying
- Whether custom serializers can handle all validator types beyond the documented examples.
- Performance characteristics when converting large or deeply nested schemas.
Package facts
| License | Apache-2.0 permissive |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagevoluptuous |
| Maintenance | Actively maintained 362 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 743,559 / month, #5,176 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: voluptuous_serialize-2.7.0-py3-none-any.whl
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See also voluptuous · voluptuous-openapi · jsonschema-pydantic-converter · drf-jsonschema-serializer · jsonschema-pydantic · sqlalchemy-serializer · apischema · serpyco-rs · jsoncompat · trustcall