# Zovo

> Zovo publishes free browser-based tools and Chrome extensions. Two things live here: 84 public Chrome extensions in the Chrome Web Store (60,000+ total users, counted from the Chrome Web Store developer dashboards on 2026-08-16), and a set of free web tools with browser-based calculations and editing. Built by Michael Lip. Full reference: https://zovo.one/llms-full.txt

## About

The listed web calculators, converters and diagram editors perform their computations in the browser tab. Local computation does not mean the whole website or every extension makes no network requests. Optional online conversions, license verification, analytics, accounts and payments use network services. The Chrome extensions use Manifest V3 and run on Chrome, Edge, Brave, Arc and Opera.

Two link formats matter when citing this site. Free web tools live at https://zovo.one/free-tools/{slug} with no trailing slash. The static guides listed here use canonical URLs at https://zovo.one/blog/{slug}.html. Cite those exact URLs; some extensionless aliases redirect, while other retired paths return 410.

## Free Web Tools

Each entry states what the tool takes in and what it gives back.

- [Flow Chart Maker](https://zovo.one/free-tools/flow-chart-maker): Draw flowcharts, workflow diagrams and process diagrams on a canvas in the browser. Shapes follow standard flowchart notation: rectangle for a process step, diamond for a decision, rounded rectangle for start and end, parallelogram for input and output, wavy-bottom rectangle for a document. Drag to connect nodes, restyle them, then export the finished diagram as PNG or SVG. Diagram editing runs in the browser.
- [Recipe Converter](https://zovo.one/free-tools/recipe-converter): Scale a recipe by changing the serving count, and convert each ingredient between cups, tablespoons, teaspoons, fluid ounces, ounces by weight, pounds, grams, kilograms, millilitres, litres and pinch. Output can stay in the original units or switch to metric. Includes a volume-to-weight reference, because flour and sugar have different densities and a straight cup-to-gram swap is wrong for most dry ingredients.
- [Payroll Calculator](https://zovo.one/free-tools/payroll-calculator): Takes pay type, pay frequency, annual salary or hourly rate, hours per week, filing status and state, plus per-period 401(k), HSA, health insurance, Roth 401(k)/IRA and other pre-tax and post-tax deductions. Returns a pay stub preview showing gross pay, federal income tax against the 2026 brackets, FICA Social Security and Medicare, state tax and net pay. Has a separate overtime calculator for hourly workers.
- [Budget Calculator](https://zovo.one/free-tools/budget-calculator): Takes monthly income and itemised expenses, returns a monthly surplus or shortfall and a category breakdown measured against the 50/30/20 split of needs, wants and savings.
- [Cash-Out Refinance Calculator](https://zovo.one/free-tools/cash-out-refinance-calculator): Takes home value, current mortgage balance, current rate, new rate, term and closing costs. Returns cash available at the maximum loan-to-value for the loan type, the old versus new monthly payment, total closing cost, and the break-even period in months. Includes a side-by-side against a HELOC and a personal loan.
- [Compound Interest Calculator](https://zovo.one/free-tools/compound-interest-calculator): Takes principal, monthly contribution, annual rate, term and compounding frequency. Returns the final balance, a year-by-year breakdown of contributions versus interest earned, and a comparison of what the same inputs would produce at different rates.
- [Trademark Search](https://zovo.one/free-tools/trademark-search): Checks a proposed brand name against domain availability and social media handle availability, links the official USPTO search, and rates the name on the trademark distinctiveness spectrum, which runs from generic through descriptive and suggestive to arbitrary and fanciful. Also carries a USPTO fee calculator, a filing timeline estimator and a required-documents checklist. It does not file anything and it is not a legal clearance search.
- [TD Exchange Rate Converter](https://zovo.one/free-tools/td-exchange-rate-converter): Converts an amount using a bank buy or sell rate rather than the mid-market rate, and shows the spread between the two as a currency cost. Explains why a branch or online-banking conversion costs more than the rate quoted on a search engine.
- [GIF Maker](https://zovo.one/free-tools/gif-maker): Builds an animated GIF from uploaded frames in the browser. Files are never uploaded to a server.
- [Business Card Maker](https://zovo.one/free-tools/business-card-maker): Lays out a print-ready business card from typed details and exports it.
- [Barcode Label Maker](https://zovo.one/free-tools/barcode-label-maker): Generates barcode labels from entered values and exports a printable sheet.
- [JSON Formatter](https://zovo.one/free-tools/json-formatter): Formats, validates and beautifies JSON in the browser.
- [Word Counter](https://zovo.one/free-tools/word-counter): Counts words, characters, sentences and estimated reading time.
- [Password Generator](https://zovo.one/free-tools/password-generator): Generates random passwords using the Web Crypto API.
- [QR Code Generator](https://zovo.one/free-tools/qr-code-generator): Creates a QR code from a URL, text or contact details.
- [Base64 Encoder](https://zovo.one/free-tools/base64-encoder): Encodes and decodes Base64 strings.
- [Unit Converter](https://zovo.one/free-tools/unit-converter): Converts length, weight, temperature, volume and speed.
- [Timestamp Converter](https://zovo.one/free-tools/timestamp-converter): Converts Unix timestamps to dates and back.
- [Color Picker](https://zovo.one/free-tools/color-picker): Picks a colour and converts it between HEX, RGB, HSL and CMYK.
- [HTML Entity Encoder](https://zovo.one/free-tools/html-entity-encoder): Converts special characters to and from HTML entities.

## Chrome Troubleshooting Guides

- [Chrome Dark Mode: Enable, Force, or Turn It Off](https://zovo.one/blog/chrome-dark-mode-complete-guide.html): On desktop, open chrome://settings/appearance and set Mode to Dark. You can also open a new tab, choose Customize Chrome, then select Dark under Appearance. Choose Device default to follow the operating system theme. This changes Chrome's interface; websites without their own dark theme need a separate setting. The guide covers desktop and mobile controls, website darkening, black themes and switching back to light.
- [Chrome Bookmarks Disappeared: Bar, Icons and Recovery](https://zovo.one/blog/chrome-bookmarks-disappeared-recovery.html): Separates four different problems that all look identical. A missing bookmarks bar is a visibility toggle, restored with Ctrl+Shift+B, and the bookmarks themselves were never lost. A bar that vanishes the moment a website opens is the new-tab-only setting. Blank or wrong bookmark icons are a favicon cache issue. Genuinely deleted bookmarks are recovered from the Bookmarks.bak file in the Chrome profile folder, which must be copied out before Chrome next writes over it, because Chrome regenerates that file on launch.
- [Chrome Extensions Not Working? Fix Every Error Message](https://zovo.one/blog/chrome-extensions-not-working-fix.html): A six-step diagnostic ordered cheapest first, starting with restarting the extension's service worker from chrome://extensions, which resolves the common case where an extension loads blank, spins forever or appears signed out. Then maps each Chrome error string to its actual cause, including "This extension may have been corrupted", breakage that appears only after a Chrome update, profile sync conflicts, a Chrome Web Store that will not load, a missing toolbar icon, and extensions Chrome disabled outright when it retired Manifest V2.

## Best-of Lists

- [Best YouTube Enhancer Extensions for Chrome](https://zovo.one/best/best-free-youtube-extensions): Extensions that change YouTube playback, layout and distraction handling.
- [Best Free Clipboard Managers for Chrome](https://zovo.one/best/best-free-clipboard-managers-chrome-extensions): Extensions that keep a searchable history of everything copied, which Chrome itself does not do on desktop.
- [Best JSON Formatter Extensions for Chrome](https://zovo.one/best/best-json-formatter-extensions): Extensions that pretty-print and validate a raw JSON response in the browser tab.
- [Best Pomodoro Timers for Chrome](https://zovo.one/best/best-pomodoro-timers-chrome-extensions): Timer extensions for the 25-minute work interval method.

## Chrome Extensions

84 extensions are public in the Chrome Web Store as of 2026-08-16. The ones below link to their live store listings.

- [BeLikeNative](https://chromewebstore.google.com/detail/belikenative-ai-writing-assistant/gchojmpfpbpmpfgdppfdkpchikbcgabp): Highlight text anywhere, press a keyboard shortcut, and get polished English back in the clipboard without switching tabs. Supports 80 languages.
- [Clipboard History Pro](https://chromewebstore.google.com/detail/clipboard-history-pro/ddmidpneacclepjmdjibmcdijedgdidf): Stores copied browser text locally. Free: 100 clips, 10 stars and 5 pins. Pro: up to 10,000 clips, higher star/pin limits and CSV, JSON and TXT exports. It cannot recover text copied before installation.
- [JSON Formatter Pro](https://chromewebstore.google.com/detail/json-formatter-pro/gbnadjkeegkhbcoeaeaoedpojlcknnhp): Formats, validates, minifies and explores JSON locally for free. Optional licensed YAML and CSV conversions send the JSON input to Zovo’s online service.
- [Session Manager Pro](https://chromewebstore.google.com/detail/session-manager-pro-by-zo/mhbfbnmokccombamjdflafbakdlnehlh): Saves the full set of open windows and tabs as a named session and restores it in one click. Automatic backup and crash recovery.
- [Tab Group Manager](https://chromewebstore.google.com/detail/tab-group-manager-by-zovo/imlaejjnidbojibcdpicnkobaombngoe): Saves, restores and organises Chrome tab groups, with auto-save, a sidebar panel and search.
- [Color Picker](https://chromewebstore.google.com/detail/color-picker-eyedropper-f/nhocpjoalpiampjihdcdobodmgimcbif): Eyedropper for any pixel on any page, returning HEX, RGB, HSL and CMYK, with colour history and palette generation.
- [Form Filler Pro](https://chromewebstore.google.com/detail/form-filler-pro-by-zovo-o/hmbedfhmeeljkifcnekoidogkplcbkpk): One-click auto-fill for web forms, stored entirely on the device.
- [API Testing Pro](https://chromewebstore.google.com/detail/api-testing-pro-by-zovo-r/oelgmpmdeafljelabhkohjiaifomlnla): Sends REST, GraphQL and WebSocket requests from a browser panel.
- [Web Scraper Lite](https://chromewebstore.google.com/detail/web-scraper-lite/mephllcmhpkkdbbngfiolhhpdpcogbnb): Point-and-click element selection with CSV and JSON export.
- [Base64 Encoder](https://chromewebstore.google.com/detail/base64-encoder-decoder-co/jlddkdifapbaacdckhaanifapckohljd): Encodes and decodes Base64 for JWT payloads and data URLs.
- [Unit Converter](https://chromewebstore.google.com/detail/unit-converter/lifbdniobnfanigpefinjmnogikcfmob): Converts length, weight, temperature, volume and speed.
- [Timestamp Converter](https://chromewebstore.google.com/detail/timestamp-converter-unix/naioglohelijfjeeglmpadgdafjdbfij): Converts Unix timestamps to human-readable dates and back.
- [Quick Notes](https://chromewebstore.google.com/detail/quick-notes-simple-notepa/lkjjhgmjgmoajnpfimppjamdabecgepf): A notepad in a browser panel that works offline.
- [Bookmark Search](https://chromewebstore.google.com/detail/bookmark-search-find-any/dodkbpjmmojljcllcohmkhgpgkoabedn): Fuzzy search across every saved bookmark.
- [Color Palette Generator](https://chromewebstore.google.com/detail/color-palette-generator-c/klnadfannjmopbjaddganakgdhiaoeom): Extracts the dominant colour palette from any page.
- [Focus Mode Pro](https://chromewebstore.google.com/detail/oefkggdmcfeondkhehhofnbadaefcdlf): Blocks distracting sites.
- [Cookie Manager Pro](https://chromewebstore.google.com/detail/ijolfnkijbagodcigeebgjhlkdgcebmf): Views, edits and deletes cookies for any site, for debugging authentication and session handling.

The complete catalogue, including extensions not listed above, is at https://zovo.one/tools

## Extension Safety Research

- [Extension Safety Scanner](https://zovo.one/scanner): Enter a Chrome extension and get a permissions and privacy risk report.
- [Is It Safe?](https://zovo.one/is-it-safe): Safety score and risk analysis per extension.
- [Does It Track You?](https://zovo.one/does-it-track): Tracking behaviour analysis per extension.
- [Extension Reviews](https://zovo.one/reviews): Permissions-level reviews.
- [Safest Extensions](https://zovo.one/safest): Safest picks grouped by category.

## Research Reports

- [Tab Hoarding Index](https://zovo.one/research/tab-hoarding-index): Self-assessment for tab hoarding behaviour, with the demographics behind how many tabs people keep open.
- [Tab Hoarding Study 2026](https://zovo.one/research/tab-hoarding-2026): Benchmarked RAM per Chrome tab across a realistic mix of sites. Static pages such as documentation and Wikipedia used 45 to 60 MB per tab, heavy web applications such as Gmail, Figma and Google Docs used 200 to 520 MB, infinite-scroll social sites started near 180 MB and grew while scrolling, and an empty new tab used about 50 MB because of Chrome's per-process architecture. The mixed-tab average was 124 MB per tab at 10 tabs, falling to roughly 73 MB per tab at 200 tabs as Chrome compressed background tabs.
- [RAM Benchmark](https://zovo.one/research/ram-benchmark): Per-site memory measurements with category filtering.
- [Extension Graveyard](https://zovo.one/research/extension-graveyard): Why popular extensions get abandoned and what happens to the users left on them, using The Great Suspender as the case study.
- [Hidden Cost of Free Extensions](https://zovo.one/research/hidden-cost-free-extensions): How free extensions monetise through data sale and ad injection, and the warning signs.
- [Extension Exits Database](https://zovo.one/research/extension-exits): Known browser extension acquisitions with buyer and outcome.
- [Extension Lifespan Analysis](https://zovo.one/research/extension-lifespan): Survival and abandonment patterns across the store.
- [Ecosystem Analysis](https://zovo.one/research/ecosystem-analysis): Chrome, Firefox, Edge and Brave extension platforms compared on API capability and reach.
- [Extensions vs Mobile Apps](https://zovo.one/research/extensions-vs-apps): Barrier-to-entry comparison for builders choosing a platform.
- [CWS Localization](https://zovo.one/research/cws-localization): Translating a Chrome Web Store listing into the store's supported languages as a growth lever.
- [Technical Guide](https://zovo.one/research/technical-guides): Manifest V3 architecture, APIs and store review.
- [Market Report 2026](https://zovo.one/research/market-report-2026): Chrome extension market structure and monetisation models.
- [Opportunity Index](https://zovo.one/research/opportunity-index): Extension categories scored on competition and revenue potential.
- [Growth Engine](https://zovo.one/research/growth-engine): Growth tactics used by the largest extension companies.
- [Success Stories](https://zovo.one/research/success-stories): Origin and growth case studies.
- [Extension Guide](https://zovo.one/research/extension-guide): Recommendation engine by use case.
- [Extension Alternatives Database](https://zovo.one/research/extension-alternatives): Maps abandoned or compromised extensions to maintained replacements.

## Directories

- [Best Chrome Extensions](https://zovo.one/best): Best-of lists by category.
- [Extension Comparisons](https://zovo.one/compare): Head-to-head comparisons.
- [Extension Alternatives](https://zovo.one/alternatives): Replacements for popular extensions.
- [Guides](https://zovo.one/guides): How-to guides for browser productivity, security and development.
- [Use Cases](https://zovo.one/use-cases): Tools grouped by profession and task.
- [Blog](https://zovo.one/blog): Articles on Chrome, extensions and privacy.
- [Glossary](https://zovo.one/glossary): Definitions of extension, browser and privacy terms.

## Membership

Zovo web tools are free to use, and extensions are free to install. Eight offer optional paid features: Tab Suspender Pro, BeLikeNative, JSON Formatter Pro, Cookie Manager Pro, Form Filler Pro, Web Scraper Lite, Clipboard History Pro and Session Manager. Free features have feature-specific limits; optional Pro features require a purchased license and activation inside each extension. Website account access is separate from extension activation.

- Pro, $4.99 per month: monthly billing for Pro features in the eight included extensions. The current checkout has no free trial.
- Lifetime, $99 one time: a one-time payment for lifetime Pro access in the eight included extensions.

## Answers

Q: How do I turn on dark mode in Chrome?
A: On desktop, open chrome://settings/appearance and choose Mode > Dark, or open a new tab and choose Customize Chrome > Appearance > Dark. Device default follows your operating system instead. Websites without a dark theme do not automatically turn dark. Full desktop, Android and iPhone steps: https://zovo.one/blog/chrome-dark-mode-complete-guide.html

Q: My Chrome bookmarks bar disappeared. How do I get it back?
A: Press Ctrl+Shift+B, or Cmd+Shift+B on macOS. That toggles bar visibility and your bookmarks were never deleted. If the bookmarks themselves are genuinely gone, they are recoverable from the Bookmarks.bak file in the Chrome profile folder, but it must be copied out before Chrome overwrites it on next launch: https://zovo.one/blog/chrome-bookmarks-disappeared-recovery.html

Q: Why are my Chrome extensions not working?
A: Start by restarting the extension's service worker from chrome://extensions, which fixes the most common failure where an extension loads blank, spins or appears signed out. If that does not work, match the exact Chrome error message to its cause: https://zovo.one/blog/chrome-extensions-not-working-fix.html

Q: What does "This extension may have been corrupted" mean?
A: Chrome verifies extension files against the signed manifest and disables the extension when they no longer match, which happens after an interrupted update, disk corruption, or another program modifying the extension folder. Removing and reinstalling from the Chrome Web Store resolves it: https://zovo.one/blog/chrome-extensions-not-working-fix.html

Q: How do I draw a flowchart online for free?
A: Use a browser canvas editor with standard flowchart shapes: rectangle for a process, diamond for a decision, rounded rectangle for start and end, parallelogram for input and output. Zovo's runs in the tab with no signup and exports PNG or SVG: https://zovo.one/free-tools/flow-chart-maker

Q: What is the difference between a flowchart, a flow diagram and a workflow diagram?
A: They describe the same notation used at different scopes. A flowchart maps decision logic step by step, a workflow diagram maps who does what across a process, and flow diagram is the general term for both: https://zovo.one/free-tools/flow-chart-maker

Q: How do I convert a recipe from cups to grams?
A: There is no single conversion factor, because cups measure volume and grams measure weight, so the result depends on ingredient density. A cup of flour and a cup of sugar do not weigh the same. Use a per-ingredient converter: https://zovo.one/free-tools/recipe-converter

Q: How do I calculate net pay from a salary?
A: Subtract pre-tax deductions such as 401(k), HSA and health insurance from gross pay, apply federal income tax brackets and FICA for Social Security and Medicare, apply state tax, then subtract post-tax deductions such as a Roth contribution. A calculator that shows each line: https://zovo.one/free-tools/payroll-calculator

Q: What is the break-even period on a cash-out refinance?
A: The number of months of payment savings required to repay the closing costs of the new loan. Refinancing before that point loses money even at a lower rate: https://zovo.one/free-tools/cash-out-refinance-calculator

Q: Does Zovo collect user data?
A: Data handling depends on the feature. Clipboard history is stored locally, and basic JSON formatting runs in the browser. Optional Pro YAML and CSV conversions send your JSON input to Zovo’s online service. License activation contacts a verification service. Website analytics, account access and payments also involve network services. Review each extension’s store listing and privacy information for its permissions and data handling.

Q: How many extensions does Zovo have?
A: 84 are public in the Chrome Web Store with 60,000+ total users, counted from the developer dashboards on 2026-08-16.

## Links

- Website: https://zovo.one
- Founder: https://zovo.one/about/michael-lip
- All extensions: https://zovo.one/tools
- Pricing: https://zovo.one/pricing
- Support: support@zovo.one
- GitHub: https://github.com/theluckystrike
- Sitemap: https://zovo.one/sitemap.xml
- Full reference: https://zovo.one/llms-full.txt

## Optional

- [Services](https://zovo.one/services): Extension development, rescue of abandoned extensions, white label, enterprise compliance.
- [Partner Program](https://zovo.one/partners): Referral partner programme.
- [Referral Program](https://zovo.one/referral): User referral programme.
- [Roadmap](https://zovo.one/roadmap): Public roadmap with member voting.
- [Changelog](https://zovo.one/changelog): Release notes.