Felo

English Language Simplifier Online

Turn English question words and modals into plain category nouns with a fixed, inspectable substitution list, so sentences read more like keyword-style text. Every change is listed with its reason, untouched text is preserved exactly, and an unambiguous reverse pass is available. Try it online.

What is English Language Simplifier Online?

English Language Simplifier Online is a text tool that rewrites a specific, fixed set of English question words and modal verbs into plainer noun-style or verb-style equivalents. It is built for people who want a keyword-like version of a sentence, for example when preparing short English text for machine processing or when they simply want question words replaced by category labels.

The substitution list is small and public: what becomes information, when becomes time, why becomes reason, who becomes subject, whom becomes object, whose becomes owner, where becomes location, how becomes manner, which becomes choice, and can, could, would and will all become do. Nothing else is rewritten. That transparency is the point: you can see the whole rule set and check every change.

Key Features

Fixed substitution table. Only the listed words change. Everything else, including punctuation, spacing and capitalization patterns, is preserved.
Change report. Each replacement is listed with the original word, the replacement and a short reason, so the output is auditable rather than mysterious.
Whole-word matching. Words that merely contain a listed word, such as "somewhere" or "whomsoever", are left alone.
Reverse pass. When a simplified word maps back to exactly one original, the tool can restore it; ambiguous cases such as "do" are flagged instead of guessed.
Preservation check. The tool confirms that the output differs from the input only at the reported positions.

How to Use

Paste or type your English text into the message. A single sentence or a short paragraph both work.
Ask for the simplified version. The agent returns the converted text in a copyable block, followed by a short table of changes.
If you need the original wording back, ask for the reverse pass. Ambiguous words are reported rather than silently converted.

Example Use Cases

Preparing keyword-style text for NLP experiments. If you are testing how a pipeline handles simplified English language simplifier NLP text, this tool gives you a reproducible, rule-based version you can compare against.
Simplifying sentences for readability checks. When you want to simplify sentences by replacing question words with category nouns, the change report shows exactly which words drove the difference.
Teaching word classes. Ask the agent to simplify this for me and then explain why "how" became "manner"; the reason column makes the mapping visible to learners.

Tips for Best Results

Keep the text as plain prose. The tool does not parse grammar, so it will not restructure clauses.
Check the change report before using the output anywhere important; the substitution is literal, not semantic.
For reverse conversion, work on short passages so ambiguous words like "do" are easy to resolve by hand.

FAQ

What input does it accept?
Plain English text of any reasonable length. Very long passages are handled in sections, and the tool tells you when it has split the work.

How accurate is the result?
It is exact with respect to the stated table: listed whole words are replaced, everything else is preserved. It is not a paraphrase engine and does not claim to make text genuinely easier for a reader or a model to understand.

How is this different from some free text tools?
Some free text tools apply an undocumented word list and show only the result. This agent shows the complete rule set, lists every change with a reason, preserves unmatched text exactly, and offers a guarded reverse pass. It does not add features the original page never had, such as grammar rewriting or translation.