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Ruby / Lua / Perl Formatter

Reindent Ruby, Lua, or Perl source. One tool, three keyword-driven languages.

Free No signup Client-side Privacy friendly

How to use

  1. 1 Pick the language: Ruby, Lua, or Perl.
  2. 2 Paste source code.
  3. 3 Tune indent size — 2 spaces is idiomatic for Ruby, 2 or 4 for Lua and Perl.
  4. 4 Copy or download the result.

Why use this tool

  • One tool covers three syntactically similar block-end-keyword languages.
  • Per-language openers: <code class="rounded bg-slate-100 px-1 text-xs dark:bg-slate-800">do/end</code> for Ruby, <code class="rounded bg-slate-100 px-1 text-xs dark:bg-slate-800">function/end</code> for Lua, braces for Perl.
  • Pure client-side — your code never leaves the browser.
  • For canonical output use RuboCop (Ruby), StyLua (Lua), or perltidy (Perl) locally.

Frequently asked questions

Is this RuboCop-compatible?

No — this is a reindenter only. RuboCop applies hundreds of style cops; we apply indent rules based on block-opening keywords.

Does it understand here-docs and string interpolation?

Indent is computed line-by-line, so here-doc bodies may receive an extra leading space. For files heavy in here-docs, run the language-specific formatter.

Why is one tool for three languages?

Block structure is similar — single keyword opens, <code class="rounded bg-slate-100 px-1 text-xs dark:bg-slate-800">end</code> or <code class="rounded bg-slate-100 px-1 text-xs dark:bg-slate-800">}</code> closes. One rule engine, three keyword sets.

Summary

Ruby / Lua / Perl Formatter is a free developer utility by Zerethon Tools. Reindent Ruby, Lua, or Perl source. One tool, three keyword-driven languages. Runs entirely in the browser — no signup, no upload.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. Ruby / Lua / Perl Formatter runs entirely client-side — no server upload, no logging, no tracking of your input.

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