joewalnes/filtrex

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1071 stars · 73 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Filtrex is a small JavaScript library that compiles a simple, spreadsheet-like filter expression language written by end-users into safe, fast JavaScript functions. It avoids eval() by sandboxing expressions so users can enter arbitrary filters without security risk.

Use cases

• let end-users write filter expressions to search items
• compile user-entered expressions into safe javascript functions
• filter spreadsheet-like data with user-defined rules
• build a browser-based spreadsheet with custom formulas
• colorize or highlight items based on user expressions
• avoid eval() when evaluating user input

When to choose

• you need end-users to enter simple filter or search expressions safely
• you want compiled, fast expression evaluation without eval()
• you need a tiny, predictable expression language with no loops or recursion

When to avoid

• you need a full scripting language with loops, functions, or recursion
• you need complex types beyond numbers and strings
• you need an actively developed library with recent releases

Facets

library · maturity maintenance

parser compiler search-engine security developer-tools web-development frontend parsers browser cross-platform expression-language expression-compiler sandboxed-eval user-input-filtering runtime-compilation javascript nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="joewalnes/filtrex")