Dev tools · alternatives · 2026

24 alternatives to File Validator

first Python validation library to validate files using mime

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. File Validator launched in 2022; newer entries below may have overtaken it.

1. 1
   PySchemes – A library for validating data structures in Python▲94

   PySchemes is a library for validating data structures in python - spy16/pyschemes

   2017 · github.com · its alternatives →

2. 2
   Validator▲345

   Research and validate you micro saas ideas fast as Cheetah

   2024 · validator.help · its alternatives →

3. 3
   I am building a new Python library to read/write PDF files▲279

   Hi HN! This is my pet project, written from scratch because there is so much to discover and learn in the process. The focus is on simplicity and incremental updates. Progress is slow because I do not have much spare time to work on this, but I would love to hear some feedback. Regards

   2022 · github.com · its alternatives →

4. 4
   MIFieldValidator▲9

   Simplest way to use custom field validator

   2019 · github.com · its alternatives →

5. 5
   a small jQuery Form Validation library▲47

   Got bored of using other ones, so made my own. Contribute to jackfranklin/jQuery-Form-Validator development by creating an account on GitHub.

   2012 · github.com · its alternatives →

6. 6V1
   Validr-1.2 – Fastest Python validation library plus powerful features▲8

   A simple, fast, extensible python library for data validation. New features: * union validator * dynamic dict validator * timedelta validator * enum validator * slug validator * fqdn validator * nested model class GitHub: https://github.com/guyskk/validr Document: https://github.com/guyskk/validr/wiki Usage: https://github.com/guyskk/validr/wiki/Scenario-&-Example

   2020 · its alternatives →

7. 7VJ
   validate.js - lightweight JavaScript form validation library▲102

   2011 · rickharrison.github.com · its alternatives →

8. 8
   A quality checker for Python wheels▲42

   Check your wheels have the right contents. Contribute to jwodder/check-wheel-contents development by creating an account on GitHub.

   2020 · github.com · its alternatives →

9. 9
   octaValidate▲69

   A client-side form validation library

   2022 · github.com · its alternatives →

10. 10
    Config-file-validator – CLI tool to validate all your config files▲33

    Cross-platform CLI tool to validate configuration files across 18 formats. Syntax and schema validation with JSON Schema, XSD, and SchemaStore integration. Written in Go. - Boeing/config-file-validator

    2023 · github.com · its alternatives →

11. 11
    Koda Validate – Typesafe, combinable validation for Python▲30

    Typesafe, Composable Validation. Contribute to keithasaurus/koda-validate development by creating an account on GitHub.

    2022 · github.com · its alternatives →

12. 12
    Faster UTF-8 validator▲122

    A very fast library for validating UTF-8 using AVX2/SSE4 instructions - zwegner/faster-utf8-validator

    2019 · github.com · its alternatives →

13. 13MF
    My first open source project (micro check library)▲13

    Check types, regexps, presence, time and more...

    2015 · arasatasaygin.github.io · its alternatives →

14. 14
    Valid8r, Functional validation for Python CLIs using Maybe monads▲6

    I built Valid8r because I got tired of writing the same input validation code for every CLI tool. You know the pattern: parse a string, check if it's valid, print an error if not, ask again. Repeat for every argument. The library uses Maybe monads (Success/Failure instead of exceptions) so you can chain parsers and validators: # Try it: pip install valid8r from valid8r.core import parsers, validators # Parse and validate in one pipeline result = ( parsers.parse_int(user_input) .bind(validators.minimum(1)) .bind(validators.maximum(65535)) ) match result: case Success(port): print(f"Using…

    Nov 2025 · github.com · its alternatives →

15. 15
    REST Data Validator▲3

    Library designed to offer comprehensive data validations

    2024 · rest-data-validator.netlify.app · its alternatives →

16. 16
    Octavalidate▲61

    A client-side and server-side form validation library

    2022 · octagon-simon.github.io · its alternatives →

17. 17
    Rust based eBook library for Python, with MIT license▲33

    fast, rust based epub library for python. Contribute to arc53/fast-ebook development by creating an account on GitHub.

    Apr 2026 · github.com · its alternatives →

18. 18
    Validater – a python tool to validate data by schema▲5

    A simple, fast, extensible python library for data validation. - guyskk/validr

    2016 · github.com · its alternatives →

19. 19
    Mailerio▲30

    Keep your lists clean with email validation tool

    2025 · mailerio.com · its alternatives →

20. 20
    Emails_Validator▲6

    Accurate, affordable and secure emails verification service

    Jan 2026 · emailsvalidator.in · its alternatives →

21. 21
    Form-validation.js – JavaScript form validation library▲29

    The most customizable validation framework for JavaScript. - soc221b/form-validation.js

    2020 · github.com · its alternatives →

22. 22
    Validation of CSV file against user defined schema (returns back object with data and invalid messages)▲3

    CSV File Validator

    2018 · github.com · its alternatives →

23. 23
    Profanity-check – A fast, robust Python library for detecting profanity▲14

    A fast, robust Python library to check for offensive language in strings. - vzhou842/profanity-check

    2018 · github.com · its alternatives →

24. 24
    Weemple Video Station Validator▲3

    Tool to validate the metadata of Synology Video Station.

    2021 · apps.microsoft.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →