Change what you read
Fix terms across articles and docs, shape language your way, or add a little fun. Pages keep updating as you scroll, and rules follow along.
Sunday → Funday
Shown near the end of the demo, on Google and Wikipedia.
Free for everyday use, no account needed
Replace text automatically as you browse and type.
Set a rule once, like teh to the or Sunday to Funday, and your browser applies it quietly from then on. Reading or typing, it just happens.
Free for up to 100 rules in up to 5 collections. Available for Chrome and Edge. Getting started · Try live demo
0:00
A simple rule, applied everywhere
Open the popup on Facebook and save Twittler to X. The page updates on its own.
Twittler → X
0:35
A shortcut that thinks a little
Create a regex rule with a capture group. Type a short prompt and it expands with your topic in the right spot.
prompt idea → full prompt
1:10
Change what you read
Save Sunday to Funday, search Google, and watch results change. Open Wikipedia and it still applies.
Sunday → Funday
Prefer YouTube? Watch it there.
Live preview (example 1/3)
Before: hello world
After: hi world
One set of rules, two quiet jobs
You will see both in the video above. Use either one, or both together.
Skip what you retype
Turn shorthand into full phrases in inputs, placeholders, and editors. Handy for typos you always make and replies you always send.
omw → On my way!
Shown in the middle of the demo, with a regex prompt shortcut.
How it works in the video
Three small moments. If you can follow these, you already know the product.
First, 0:00
Save a plain rule
Open the popup and save Twittler → X. The Facebook page updates right away, no refresh dance.
Next, 0:35
Reuse a prompt with regex
Build one shortcut with a capture group. Your topic lands in the right place of the expanded prompt, every time.
Then, 1:10
Let it run while you browse
Save Sunday → Funday, search Google, and open a Wikipedia result. The swap holds across pages.
Want the written version? Getting started · How rules work · Compatibility and limits
Small controls that stay out of your way
Everything below is included in the free plan, within the free limits.
Custom rules
Save teh → the once. It applies while you browse and type.
Plain text plus regex
Match literally, or use patterns with capture groups. Use \b for whole words. Bad patterns are skipped safely.
Collections
Group rules so typos, work phrases, and fun swaps live apart. Free includes up to 5.
Site scope per rule
Run everywhere or only on chosen sites. Pause any rule, collection, or site without deleting it.
Inputs, editors, live pages
Covers page text, inputs, placeholders, rich editors, frames, and open shadow DOM, even as pages update.
Templates and backup
Start from one click templates, test with live preview, and keep a JSON backup of your setup.
A few honest limits (store pages, closed shadow DOM, canvas text, file:// needs opt in): Compatibility · Troubleshooting
Start free, grow into Pro only if you need room
The free plan handles everyday fixes. Pro simply removes the caps when your collection grows.
Free
Plenty for daily typos and a few favorite swaps.
- Up to 100 rules
- Up to 5 collections
- Plain text plus regex
- Templates plus import and export
Pro: $2.99/mo, $19.99/yr, or $49.99 lifetime
For growing libraries. Same features, just no counting. Bought inside the extension.
- Everything in Free
- Unlimited collections
- Unlimited rules
Prices in USD. If this page ever differs from the in-extension checkout, the checkout is authoritative. Compare plans
Questions people usually ask
What is Auto Text Replacer?
A browser extension that applies your own find-and-replace rules automatically while you browse and type. Plain text or RegEx, organized in collections.
How does text replacement work?
Save a find and replace pair in the popup. Rules run top to bottom on matching pages; each rule sees previous results, so they can chain.
Can it replace text while I browse?
Yes. Page text, including dynamically loaded content, frames, and open shadow-DOM components, is rewritten passively as you read. Example: Sunday to Funday.
Can it replace text while I type?
Yes. Input and textarea values, placeholders, and contenteditable editors are rewritten as you type. Example: omw to On my way! No clicks needed.
Can I create custom replacement rules?
Yes. Create rules with custom names, group them into collections, scope by site, and skip inputs or selectors per rule. Starter templates are free.
Does it support regular expressions?
Yes. Use RegEx patterns with flags (i/g/m/s/u). For whole words use boundaries, e.g. \bi\b replaces standalone i without changing instinct.
Which browsers are supported?
Chrome via the Chrome Web Store listing and Edge via the Edge Add-ons listing. Firefox is supported via a Firefox build; a public Firefox listing is not yet linked.
Is it free?
Yes. Free includes up to 100 rules in up to 5 collections, starter templates, and live test preview. No account needed.
What does premium include?
Pro unlocks unlimited collections and unlimited rules. $2.99/month, $19.99/year, or $49.99 lifetime inside the extension.
How do I get started?
Install, open the popup, save hello to hi, then type or view hello on any page. Or try the live demo first with no install.
More: Full FAQ · Troubleshooting · Compatibility · Privacy
Your words stay yours
Rules live in your browser. Page text never leaves your device for analytics. We only count anonymous, overall usage. Need a hand? Contact support.
Still deciding? Try the live demo with no install.