ToolzyLab
Quickly search and replace words, phrases, or patterns across large text blocks. Perfect for bulk edits, content cleanup, keyword replacement, log updates, code snippets, and repeated text changes right in your browser.
Paste text, upload a file, search specific words or patterns, preview all matches, replace one or replace all, use case-sensitive mode, whole-word matching, or regex for advanced find and replace workflows.
Paste text, upload a .txt or similar file, then search and replace instantly inside a clean side-by-side workspace.
📄 .txt / .csv / .log / .md · 🔎 find matches · ♻ replace instantly · ⌨ copy · ⬇ download · 🔒 no uploadSearch in the original text and preview the edited result on the right.
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Each found result appears here with line number and context preview.
Use normal mode for simple word replacement, whole-word mode for safer edits, and regex mode when you want to match patterns like emails, numbers, dates, or repeated formatting structures.
Quick stats so users can instantly understand what changed.
It finds words, phrases, or regex patterns, highlights every match, lets users jump between matches, replace the current match, replace all matches, preview output instantly, and export the final updated text in a clean ToolzyLab workspace.
Replacement is safe only when the match definition is clear. Enter source text, search value, and replacement, choose current or all scope, case sensitivity, whole-word or regular-expression mode, then inspect match count and navigate examples before committing the output.
A literal search is appropriate for names, labels, paths, and exact phrases. Case-insensitive mode groups different capitalization, while whole-word mode avoids replacing a short term inside a longer one. Word-boundary behavior can differ around underscores, hyphens, accented letters, and scripts, so inspect representative matches.
Use regex mode when the target is structural rather than a fixed phrase. Escape literal punctuation, anchor where appropriate, and test greedy quantifiers. Replacement references such as captured groups follow engine-specific syntax. A pattern that matches an empty string can insert content at many positions and needs special caution.
Navigate matches to learn the data before a bulk replacement. Check totals, line endings, identifiers, URLs, and generated content. Preserve the source or use version history, then diff the result. This page changes text content only and does not understand code symbols, ASTs, database records, or file-system paths semantically.
Preview multiple matches and compare the final output with the source before using it.
Technical references: MDN guide to JavaScript regular expressions
Replace Current changes only the active match and supports step-by-step review. Replace All applies the same rule to every current match, so verify scope and count first.
Enable whole-word mode and inspect punctuation, hyphens, underscores, and non-Latin text. Boundary definitions depend on the regex engine and character classes.
Use it when capitalization carries meaning in names, identifiers, paths, code, or branded terms. Disable it only when every case variation should receive the same replacement.
Parentheses capture matched parts that can be referenced in the replacement using the syntax supported by the JavaScript engine. Test a small sample because literal dollar signs and group numbering need escaping.
The pattern may match an empty string, use an overly broad quantifier, or lack anchors. Inspect matches before replacing and tighten the expression.
It can replace text but does not understand scope, imports, strings, comments, or symbols. Use a language-aware refactoring tool for production code.