Free utilities for Python developers. Test patterns, generate type-safe models, and automate repetitive tasks faster.
Test Python regex patterns against sample text in real time. See full matches, groups, named captures, and flags like re.IGNORECASE.
Paste any JSON response and get a Pydantic v2 model class with proper field types, validators, and optional fields.
Paste your requirements.txt and check for outdated packages, version conflicts, and known security vulnerabilities across your whole stack.
Paste a Python function without type hints and get it back annotated with inferred types based on defaults and naming patterns.
Build and validate cron expressions for APScheduler, Celery Beat, and standard cron. See the next 10 scheduled runs.
Encode and decode strings, bytes, and JSON using Base64 and URL encoding. Handles both standard and URL-safe Base64.
Convert old-style % formatting and .format() strings to modern f-strings. Handles complex expressions and multiline strings.
Pick dates and common patterns — get the correct `%Y`, `%m`, `%d`, timezone, and locale directives for `datetime.strftime`, `strptime`, and logging formatters. Preview the output string.
Browse and copy production-ready Python decorator patterns — retry, rate limit, cache, singleton, timer, and more.
Admin generator, secret key generator, settings checker, serializer builder, and more free Django tools.
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