Find and Replace

Search any text and replace every match instantly. Plain-text mode for literal swaps, regex mode with capture groups for restructuring, all live as you type.

Your text

Find

Replace with

Regex mode

Match case

Whole words

Replace all

Result

Matches found

Replacements made

Input chars

Output chars

Technical Specifications

Exactly how matching and replacement behave.

Option	Rule
Plain mode (default)	Search text is escaped and matched literally; regex characters lose special meaning
Regex mode	Pattern compiles to a JavaScript RegExp; invalid patterns show an error and freeze output
Match case (default on)	Off adds the case-insensitive flag in both modes
Whole words (default off)	Wraps the pattern in word boundaries; punctuation-adjacent words still match
Replace all (default on)	Off replaces only the first match while still reporting the total found
Replacement patterns	`$&` inserts the whole match; `$1`–`$9` insert capture groups; `$$` inserts a literal dollar
Processing location	100% client-side JavaScript in your browser memory; nothing is uploaded
Usage limit	None — process unlimited texts for free, no signup required

Features

⚡

Live Preview

Every keystroke in text, pattern or replacement instantly rebuilds the result.

🧩

Real Regex

Full JavaScript patterns with groups, classes and back-references for restructuring.

🎯

Precise Control

Case, whole-word and first-only toggles narrow matches exactly as intended.

🔒

Local Device Privacy

Everything runs in your browser with plain JavaScript. Text never leaves your device.

How to Use Find and Replace

Paste your text into the input box.
Type what to find and what to replace it with.
Toggle regex mode for patterns, whole words for precision, or first-only for single swaps.
Check the match counts to confirm the scope before copying.
Click Copy Result or Download .txt to keep the replaced text.

From Simple Swaps to Regex Surgery

Everybody renames things: rebranded products across pages, outdated years in footers, placeholder names in templates. Manual editing misses occurrences and introduces typos; a live find-and-replace with a visible match count turns the chore into a two-field formality.

Plain swaps and whole words

Plain mode is substring search with the sharp edges removed — dots match dots, never “any character”. Whole-word mode adds boundaries so renaming “cat” leaves “concatenate” and “certificate” untouched. Uncheck match-case when source casing is inconsistent, and use first-only mode for one-off fixes inside repeated text.

Regex restructuring

Capture groups turn replacement into rearrangement: pattern (\w+)@(\w+) with replacement $2/$1 flips two halves around a slash in every match at once. Character classes like \d+ normalize all numbers regardless of value. For case changes on the result, run it through the Case Converter next.

Honest limitations

Patterns run per match without lookbehind limits of older engines applying — modern JavaScript regex is fully supported, but catastrophic backtracking on huge inputs can still hang the tab, so test wildcards on small samples first. The tool replaces within one text only; multi-file projects need an editor. For very large pastes of tens of megabytes, live replacement on each keystroke can feel slower on older phones.

Privacy and Client-Side Security

Privacy Guarantee: All searching occurs locally inside your browser. Your text and patterns are never transmitted, stored, or recorded on remote servers.

Many online tools send your pasted text to a server for processing — a poor fit for source code, manuscripts or private data. TinyToolzz takes a different approach: every match runs in the page itself with plain JavaScript.

Because nothing is uploaded, there is no waiting, no account, and no copy of your data retained anywhere. Your text exists only in the tab's memory and is discarded when you close the page or click Clear.

Frequently Asked Questions

What is the difference between plain and regex mode?

Plain mode treats your search as literal text, so dots and brackets match themselves. Regex mode treats it as a regular expression, unlocking wildcards like \d+ for digits, character classes and capture groups such as (\w+)@(\w+) for restructuring matches.

How do whole-word and match-case options work?

Whole-word wraps the pattern in word boundaries so cat skips concatenate. Match-case keeps Apple distinct from apple; turning it off matches all casings and preserves each match's original position. Both apply in plain and regex modes.

Can I reuse matched text in the replacement?

Yes. Standard dollar patterns work: a dollar-ampersand inserts the whole match, while $1 and $2 reference regex capture groups. Replacing (\w+)@(\w+) with $2/$1, for example, flips two captured parts around the slash.

What happens with an invalid regular expression?

The output freezes on the last valid result and a clear error explains the problem, such as an unterminated group. Fix the pattern and live replacement resumes immediately; nothing is lost.

Is there a text length limit?

There is no fixed limit. The tool processes documents of several megabytes in memory. Extremely large pastes (tens of megabytes) may respond more slowly because replacement runs on each keystroke.

Is my text uploaded to a server?

No. All searching happens locally in your browser with JavaScript. Your text and patterns are never transmitted, stored or logged anywhere. Closing the tab or clicking Clear removes everything immediately.

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Find and Replace

Result

Technical Specifications

Features

Live Preview

Real Regex

Precise Control

Local Device Privacy

How to Use Find and Replace

From Simple Swaps to Regex Surgery

Plain swaps and whole words

Regex restructuring

Honest limitations

Privacy and Client-Side Security

Frequently Asked Questions

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