Search and replace words, phrases, or code snippets across long documents. Supports case sensitivity, whole words, regex patterns, and letter case preservation. 100% private.
Quickly search and replace words, phrases, or code blocks in your documents. Includes advanced match controls like case preservation and regular expressions with real-time match counters.
Fast and easy from start to finish
Enter or paste the document you wish to edit into the main editor.
Type the word or phrase to locate in 'Find Text' and your desired replacement in 'Replace With'.
Select any desired matching options such as Case Sensitive or Preserve Letter Case.
Click 'Replace All Matches' and copy or download your updated document.
What you can do with this tool
Multi-Line Search: Find and substitute multi-line paragraphs, headers, and code blocks.
Preserve Case Option: Automatically adapts replacement casing (e.g. replacing 'car' substitutes 'Truck' -> 'Car' and 'truck' -> 'car').
Exact Word Matching: Prevents accidental partial word replacements using whole-word boundary detection.
Regular Expression Engine: Power users can leverage full regex pattern matching.
Undo History: Revert changes step-by-step with an interactive undo stack.
Unlock batch scale, higher resolution, and expanded limits
Find and swap words across dozens of uploaded text files in one pass.
Store reusable keyword lists for product names, author credits, and dates.
Ready-to-use search patterns for emails, URLs, dates, and currency amounts.
Everyday walkthroughs and starter ideas for Multi-Line Find & Replace Tool
Replace 'http://old-domain.com' with 'https://new-domain.com' across an entire configuration file.
File requirements, capabilities, and system limits
Extremely complex regular expressions with unbounded lookaheads may take a moment to evaluate on long texts.
Helpful definitions of features and parameters
A sequence of characters that specifies a search pattern in text, enabling advanced wildcard matching.
How creators, students, and professionals use Multi-Line Find & Replace Tool
Renaming code variables or function calls across script files
Updating company names or branding across marketing copy and contracts
Filling variable placeholders (like {{name}}) in template emails
Migrating legacy website URLs and server paths to new domains
Answers to common questions about Multi-Line Find & Replace Tool
It mirrors the capitalization of the matched word: if the original was capitalized ('OldApp'), the replacement is capitalized ('NewApp'); if lowercase ('oldapp'), it becomes lowercase ('newapp').
Yes. Both the Find and Replace input areas support multiple lines and line breaks.
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