UtilEngine UtilEngine

The launcher your browser is missing.

A collection of everyday productivity tools inside a fast, keyboard-first launcher that lives on every page of your browser. Chat with AI, save your windows as sessions, and search your tabs and history without leaving the page.

Get it for $49
Start typing...
Suggestions
  • Chat with AIAICommand
  • Search YouTubeBookmark
  • Convert To PNGImage ConverterCommand
  • URL Encode / DecodeURLCommand
  • Save SessionSessionsCommand
Open

Save hours every week

Skip the tab-hopping. Commands run inline.

Buy once, use forever

No subscriptions. No hidden fees.

New tools monthly

All future updates included, no extra charge.

Stays in your browser

Your data is yours. We check your purchase, never your browsing.

How it works

+Z

Everything you need,
one shortcut away

+ Z

Shortcuts

Every tool, any page. Alt+Z by default, change it anytime.

Calculator
Type math in the search bar. Functions, constants, history, all inline.

Calculator

Type math in the search bar. Functions, constants, history, all inline.

Chat with AI
Full chat with any model, on any tab.

Chat with AI

Full chat with any model, on any tab.

AI Commands
Reusable prompts with dynamic variables, and a different model for each one.

AI Commands

Reusable prompts with dynamic variables, and a different model for each one.

Ask AI
Type a question. Hit Tab. Skip the chat UI.

Ask AI

Type a question. Hit Tab. Skip the chat UI.

Bookmarks
Save sites with placeholders. Launch them by name from any page.

Bookmarks

Save sites with placeholders. Launch them by name from any page.

History
Find any visited page. Type a keyword or paste a URL.

History

Find any visited page. Type a keyword or paste a URL.

Downloads
Find any past download. Open it again in one click.

Downloads

Find any past download. Open it again in one click.

Tabs
Type t, find any open tab. Close a dozen at once.

Tabs

Type t, find any open tab. Close a dozen at once.

Currency Converter
35 currencies, live rates. Type 100 USD to EUR in the search bar.

Currency Converter

35 currencies, live rates. Type 100 USD to EUR in the search bar.

Sessions
Save any window as a session. Restore it anywhere, anytime.

Sessions

Save any window as a session. Restore it anywhere, anytime.

Email intro

Hi {name}, thanks for the intro. Free {day} at 3.

sig
Reply to Priya

Hi Priya, thanks for the intro. Free Thursday at 3.

Snippets

Save text you type often. Insert it into any field by name, arguments included.

Extensions

Switch any installed extension on or off without opening the extensions page.

6 ft 182.88 cm
212 °F 100 °C
2 GB 2,000 MB
90 min 1.5 h

Unit Converter

Type 6 ft to cm in the search bar. Length, weight, temperature, and more.

50+

and counting

Tools & Commands

Text, code, images, JSON, URLs, and more.

Never lose a window

Save any window as a session. Close it, reopen it tomorrow, or on another machine.

Explore sessions
Q3 Redesign5 tabsLive
Figma - Q3 Redesign
Competitor teardown
Pricing research
Analytics
Launch checklist
Snapshots run on their own, every hour

AI where it's most useful, in your browser

Ask about a page, rewrite a selection, or write your own commands. Runs where you are, not in another tab.

Explore the AI

Which tabs did I leave open on this?

• Three on OpenRouter pricing • One on model routing • Two on the extension docs

Claude Sonnet 5

Any of them bookmarked?

Two of them, both under Reading.

Claude Sonnet 5

What did the pricing pages say?

You pay providers directly. No markup in between.

Claude Sonnet 5

Claude Sonnet 5
Ask anything...

Chat with AI

Streaming chat with any model, switchable mid-conversation. Web search included.

AI Commands6 built in
Prompt

Fix the spelling and grammar of: {selection}

AI Commands

Six built-in commands, or write your own using anything on the page.

Any modelYour key. No markup.
OpenAIGPT-5.6 SolGPT-5.5 ProGPT-5.5GPT-5.3 Codex
AnthropicClaude Opus 5Claude Sonnet 5Claude Fable 5Claude Haiku 4.5
GoogleGemini 3.7 FlashGemini 3.6 FlashGemini 3.1 Pro
MetaMuse Spark 1.3Muse Spark 1.2Muse Glimmer 30B
MoonshotAIKimi K3Kimi K2.7 CodeKimi K2.6
xAIGrok 4.6Grok 4.5Grok 4.3
Z.AIGLM 5.3GLM 5.3 FlashGLM 5.2
OpenAIGPT-5.6 SolGPT-5.5 ProGPT-5.5GPT-5.3 Codex
AnthropicClaude Opus 5Claude Sonnet 5Claude Fable 5Claude Haiku 4.5
GoogleGemini 3.7 FlashGemini 3.6 FlashGemini 3.1 Pro
MetaMuse Spark 1.3Muse Spark 1.2Muse Glimmer 30B
MoonshotAIKimi K3Kimi K2.7 CodeKimi K2.6
xAIGrok 4.6Grok 4.5Grok 4.3
Z.AIGLM 5.3GLM 5.3 FlashGLM 5.2

One profile, every browser

Your sessions, bookmarks, snippets, and AI commands follow you. Chrome, Brave, Edge, any device.

Chrome · PersonalSynced
Q3 Redesign
GitHub Issues
Translate To
Fix Spelling and Grammar
Brave · WorkSynced
Q3 Redesign
GitHub Issues
Translate To
Fix Spelling and Grammar
SessionsBookmarksSnippetsAI CommandsSettings· Syncs soonCalculator History· Syncs soon

Your favorite productivity tools, all in one place

Explore the command palette
HTML

HTML

Preview, beautify or sanitize HTML code.

  • HTML Preview

  • HTML Sanitizer

  • HTML Beautifier

Image Converter

Image Converter

Convert images to different formats effortlessly.

  • Convert Images

  • Convert To WEBP

  • Convert To PNG

  • Convert To JPEG

JSON

JSON

Parse, format or minify JSON, and convert it to YAML, CSV or vice versa.

  • JSON Parser

  • JSON to CSV

  • JSON to YAML

  • YAML to JSON

  • CSV to JSON

Text

Text

Inspect text to extract information, find diff, convert case, and more.

  • Text Case Converter

  • Text Diff

  • Text Inspector

  • Lorem Ipsum

  • Random String

  • Backslash Escape/Unescape

URL

URL

Extract information from URLs. Encode, Decode or Parse URLs.

  • URL Encode / Decode

  • URL Parser

Base64

Base64

Encode strings, images and files to Base64, decode Base64 back, and read JWTs.

  • Base64 String Encode/Decode

  • Base64 Image Encode/Decode

  • JWT Decode

Snippets

Snippets

Insert reusable text anywhere, with arguments filled in from the launcher.

  • Create Snippet

  • Save Selection as Snippet

  • Manage Snippets

  • Insert Snippet

Calculator

Calculator

Type math or a unit conversion in the search bar, all inline.

  • Calculator

  • Unit Converter

  • Calculator History

Browser

Browser

Search tabs, history and downloads, and switch extensions on or off.

  • Tabs

  • History

  • Downloads

  • Extensions

One payment, yours forever

Every tool, every AI command, every future update included.

Lifetime access

Everything UtilEngine does, today and every future update.

Every tool and command
Use on 10 devices at once
Free updates, forever
Works on Chrome, Brave, and Edge
$49USD

One-time payment. VAT included.

Get it for $49
14-day refund. No questions asked.

Already bought it? Install from the Chrome Web Store

Questions, answered

Do you offer a trial version?

No trial, but you get 14 days to refund. No questions asked.

How do I get started after buying?

Install it from the Chrome Web Store, click Sign in, and pick Google or a one-time code sent to your purchase email. No license key to copy. The extension registers the device on its own.

Can I use UtilEngine on my work and home computer?

Yes. Your account works on up to 10 devices at the same time. Manage your devices from your Dashboard.

What browsers are supported by UtilEngine?

UtilEngine works on Chrome, Brave, Edge, and other Chromium browsers. Firefox support is on the roadmap.

Do you collect my data?

No browsing data. You sign in once with Google or your purchase email, and we store your account details, your purchase record, and the browsers you have signed in on. If you use sync, your saved sessions, bookmarks, snippets, and AI commands are stored so they can follow you. Page content and browsing history never reach our servers.

What can the AI do?

Ask a question inline, summarize or rewrite a selection, ask about the page, and write your own commands. Chat can read the page you are on and search your tabs, history, and downloads. Any of 77 models, a different one per command if you like.

Do I need to pay for AI features separately?

AI features need a free OpenRouter API key. You pay OpenRouter directly for usage. We take no markup.

Does it work on all websites?

Yes. UtilEngine uses Shadow DOM isolation, so it never interferes with page styles. On restricted pages like chrome:// URLs, it opens in a standalone tab.

Go deeper

Every feature above has its own page. Start with the one you came for.

Sessions Save windows, restore anywhere
Snippets Type it once, insert it anywhere
AI Where it's most useful, in your browser
Command palette Everything behind one keystroke
Bring your own key No subscription, provider prices
vs Session Buddy Sync and hourly snapshots