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Small tools with clear behavior

modu.tools is an independently maintained collection of browser-first utilities for everyday text, data, and URL work. Each published page has one focused job, a working interface, concrete behavior notes, and limits that can be read before input is pasted.

What gets published

A tool ships only when it performs a complete task without an account and can explain what changes, what stays unchanged, and when the result needs human review. The catalog covers text cleanup, counting and slugs; JSON, YAML, CSV, Base64, hashes and Markdown; plus URL encoding and campaign-link construction.

How tools are checked

Transformation logic is exercised with automated examples, including empty input, Unicode, malformed values, and known edge cases. Every release also passes Astro type/build checks, generated-route and sitemap guards, and an axe-based static accessibility check. Keyboard, status, and narrow-screen behavior remain part of manual review.

How guidance is written

Supporting copy follows the shipped implementation and tests. It names defaults, irreversible transformations, unsupported formats, and cases where a dedicated validator or project-aware tool is safer. The site avoids invented numeric promises and does not publish placeholder pages to make the catalog look larger.

Browser-local boundary

Current tool input is processed by code running in the page rather than an upload endpoint. The site still loads normal web assets, and copying a result into another service transfers it to that service. Each tool repeats the boundary and any format-specific privacy caution beside its controls.

Corrections and updates

Behavior notes are updated when the implementation changes. Reports of a reproducible error, unclear limitation, inaccessible control, or misleading explanation are reviewed against the code and a minimal test case before the public copy is changed.

Contact

Site questions, correction reports, privacy questions, and domain inquiries can be sent to [email protected].