Life & fun · alternatives · 2026

24 alternatives to Validator.dart – String validation and sanitization library for Dart

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Validator.dart – String validation and sanitization library for Dart launched in 2014; newer entries below may have overtaken it.

1. 1
   slop-grader▲89

   Jev-AI CLI tool that evaluates text against custom rulesets

   Sep 2026 · github.com · its alternatives →

2. 2VJ
   Valib.js - validation library for the browser and Node.js▲7

   2014 · sideralis.org · its alternatives →

3. 3V1
   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 →

4. 4JE
   Jnigen – Experimental Java interop for Dart / Flutter on Android▲9

   2023 · mahesh-hegde.github.io · its alternatives →

5. 5SW
   site-wide HTML5 and CSS3 validator▲5

   2012 · markupvalidator.com · its alternatives →

6. 6RW
   Regexly – WYSIWYG Regex Playground for JavaScripters▲7

   2017 · regexly.chipto.io · its alternatives →

7. 7SM
   Silk – Markdown driven API tests▲8

   2016 · medium.com · its alternatives →

8. 8
   Tt – A Python Library/CLI for Boolean Expressions▲5

   a Pythonic toolkit for working with Boolean expressions - welchbj/tt

   2016 · github.com · its alternatives →

9. 9
   A new validation library for JavaScript (React, Backbone integration)▲8

   Validation library based on type combinators. Contribute to gcanti/tcomb-validation development by creating an account on GitHub.

   2014 · github.com · its alternatives →

10. 10JH
    JSONator – HTTP endpoints for mock data▲7

    2014 · jsonator.herokuapp.com · its alternatives →

11. 11FA
    Flawless - a Python framework for reporting exceptions via email▲5

    2013 · shopkick.github.com · its alternatives →

12. 12PT
    Piglet, the fluent parser▲8

    2012 · binarysculpting.com · its alternatives →

13. 13RE
    Regular Expressions in JavaScript – Interactive Course▲6

    2021 · slip.so · its alternatives →

14. 14BV
    Bootstrap Validator▲9

    2014 · bootstrapvalidator.com · its alternatives →

15. 15
    A decorator based testing framework for TypeScript▲6

    2021 · github.com · its alternatives →

16. 16NJ
    Noise – JSON search engine library▲6

    2017 · noisesearch.org · its alternatives →

17. 17
    JsonTree, a tool for turning JSON data into a collapsible html tree▲9

    A lightweight vanilla Javascript micro-library for making collapsible trees with JSON - MaxLeiter/jsonTree

    2016 · github.com · its alternatives →

18. 18
    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 →

19. 19CA
    Choral, a Java-compatible language for type-safe multiparty protocols▲7

    2020 · choral-lang.org · its alternatives →

20. 20
    Bulk set properties recursively in complex JSON string trees▲8

    An Experimental Regex Engine to Parse and Apply Bulk Changes to a JSON String Without Using 'JSON.parse()' for Deserialization - patternhelloworld/json-knife

    2022 · github.com · its alternatives →

21. 21
    Dart▲7

    Effortless code velocity

    2025 · usedart.dev · its alternatives →

22. 22TP
    Tamper-proof web-apps using Data URLs▲5

    2015 · geraintluff.bitbucket.org · its alternatives →

23. 23TI
    T0.io – A simple url shortener▲6

    2016 · t0.io · its alternatives →

24. 24
    REST Data Validator▲3

    Library designed to offer comprehensive data validations

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