Chrome extension · fully local · MIT

A full web designer toolkit in one extension.

Measure and mark layouts, inspect and edit live UI, pull colors and media, audit accessibility and speed, export DESIGN.md / SKILL.md for AI IDEs, clear cache, fill forms for QA, and run a WordPress builder suite — all from one free, local-first Chrome extension.

  • Manifest V3
  • Version 1.1.0
  • Free & open source
  • WordPress helper optional
0 core tools
0 WordPress actions
0 workspace presets
Aligner responsive preview and tool grid on a live page

Standout capabilities

Beyond the tool names — these are the moments designers, QA, and WordPress builders actually reach for every day.

One-click extension on / off

Master toggle in the popup. Turn the whole toolkit off for a clean tab, or scope tools to This tab vs All tabs so nothing surprises you on other pages.

Inspect & edit live

Element Inspector covers box model, CSS, structure, text, colors, spacing, images, effects, and HTML — with contrast checks and typography details without opening full DevTools noise.

DESIGN.md & SKILL.md for AI IDEs

Design System scans typography, colors, buttons, and inputs, then generates markdown you can copy into Cursor, Claude, Codex, and similar agents — so your AI works from the live site’s real tokens.

Cache management

Cache Cleaner clears cache, cookies, storage, IndexedDB, service workers, and more for the current site only — with auto-reload and an optional floating quick button.

Fake form filler for QA

Page Controls includes Fake Filler and Lorem helpers so you can stress-test forms with random data, plus toggles to hide images, block JS, stop animations, and isolate bugs without touching source.

WordPress builder suite

Role switcher, private Theme switcher, ACF field/PHP copy, admin menu search, hide notices, sidebar shrink, smart page editor, theme/plugin detector, update backlog, and Classic Customizer — in one WP Tools panel.

Everything in Aligner

Quick map of every tool — the same inventory as Aligner Home inside the extension. Hide whole groups anytime with Workspace presets after install.

Layout

Align and mark the page while you design.

Rulers
Pixel rulers on the viewport edges
Guides
Alignment lines you place and lock
Grids
Column and baseline overlays
Measure
Point or rectangle distances and area
Drawing
Temporary arrows, shapes, and notes

Inspect

Understand structure and breakpoints.

Inspect
Box model, CSS, contrast, and live element details
Responsive
Device-width preview for common sizes
Wireframe
Grayscale structural page view

Color & media

Sample colors and pull page assets.

Color Picker
Eyedropper with HEX, RGB, HSL history
Palette
Extract and save colors from the page
Media
Scan, preview, and download images / SVG / video

Quality

Catch issues before you ship.

Accessibility
Automated a11y audit with severity filters
Design Check
Typography, color, and spacing consistency
Page Speed
Core Web Vitals and performance score
Design System
Tokens + DESIGN.md / SKILL.md for AI IDEs

Utilities

Everyday helpers while testing.

Cache Cleaner
Per-site cache, cookies, storage, workers
Page Load Timer
Navigation timing and paint milestones
Page Controls
Isolate bugs + Fake Filler for QA forms

WordPress

Builder panel for WP sites. Role & Theme switcher need the helper plugin.

WP Tools
Floating panel with quick actions and detection
Admin bar toggle
Hide or show the WP toolbar
Admin / front switcher
Jump between site and wp-admin
Smart page editor
Open the right editor or page builder
Role switcher
Preview roles securely (helper plugin)
Theme switcher
Private theme preview only for you (helper)
ACF Tools
Copy field names and PHP for theme work
Theme & plugin detector
Scan assets on the current page
Update backlog
Copy updates from Dashboard → Updates
Admin menu search
Filter the left admin menu
Hide admin notices
Clean wp-admin and restore when needed
Classic Customizer
Additional CSS even on block themes
Sidebar shrink
Collapse the admin sidebar

Layout

Align, measure, and mark the page while you design.

  • Rulers
  • Guides
  • Grids
  • Measure
  • Drawing

Rulers

What: Pixel rulers along the viewport edges.

Why: Quick distance checks without leaving the page.

How: Toggle from the popup, then drag origin if needed.

Guides

What: Straight or free-draw alignment lines.

Why: Keep columns, baselines, and edges consistent.

How: Enable Guides, place lines, lock when settled.

Grids

What: Column and baseline overlays.

Why: Validate rhythm against a layout system.

How: Choose columns/gutters in popup controls.

Measure

What: Point or rectangle measurements.

Why: Capture exact sizes between elements.

How: Turn on Measure and click the page surface.

Drawing

What: Temporary annotation marks on the page.

Why: Leave visual notes during review passes.

How: Pick a drawing tool and sketch overlays.

Inspect

Understand structure, breakpoints, and wireframe intent.

  • Inspect
  • Responsive
  • Wireframe

Inspect

What: Hover inspection for box model, CSS, structure, text, colors, spacing, images, effects, and HTML.

Why: Inspect and edit understanding without DevTools overload — includes WCAG contrast and typography.

How: Enable Inspect, move across elements, open Details / Box Model / Tabs panels.

Responsive

What: Device-width preview helpers.

Why: Check layouts at common breakpoints quickly.

How: Toggle Responsive and pick a device width.

Wireframe

What: Structural wireframe rendering of the page.

Why: Review hierarchy without visual decoration.

How: Enable Wireframe for a stripped composition view.

Color & media

Sample colors, build palettes, and pull page assets.

  • Color Picker
  • Palette
  • Media

Color Picker

What: Eyedropper and color history for the page.

Why: Match brand colors from live UI.

How: Enable Color Picker and sample the screen.

Palette

What: Generated palette from page colors.

Why: Turn a live site into a reusable swatch set.

How: Run Palette and copy the groups you need.

Media

What: Inventory of images, video, SVG, and more.

Why: Audit and download assets from the current page.

How: Open Media Manager and scan the tab.

Quality

Catch accessibility, consistency, and performance issues early.

  • Accessibility
  • Design Check
  • Page Speed
  • Design System

Accessibility

What: Issue scan with severity filters.

Why: Surface barriers before shipping.

How: Enable Accessibility and review highlighted findings.

Design Check

What: Consistency checks for type, color, spacing.

Why: Spot drift across a page system.

How: Run Design Check and triage highlighted mismatches.

Page Speed

What: Local performance diagnostics for the tab.

Why: Find heavy assets and slow paths while designing.

How: Open Page Speed and run against the current page.

Design System

What: Live tokens for typography, colors, buttons, and inputs — plus Preview.

Why: Hand AI IDEs and teammates the real system the page uses, not a guess.

How: Scan, then Generate DESIGN.md / SKILL.md, Copy, Download, or quick-install for Claude, Codex, Cursor.

Utilities

Everyday helpers for cache, timing, and page behavior.

  • Cache Cleaner
  • Page Load Timer
  • Page Controls

Cache Cleaner

What: Per-site cleanup for cache, cache storage, cookies, file systems, IndexedDB, local storage, and service workers.

Why: See fresh builds without nuking your whole browser profile.

How: Pick data types, optional auto-reload / floating button, then Clear Selected Data.

Page Load Timer

What: Visible load timing for the current navigation.

Why: Compare perceived speed after edits.

How: Enable the timer and reload the page.

Page Controls

What: Temporary controls for content, styling, JS, cookies, popups, other extensions, and Fake Filler for QA forms.

Why: Isolate bugs and fill forms fast without changing source or installing separate filler extensions.

How: Toggle what you need, Apply Changes, Reset All when finished.

WordPress

Admin-aware tools for builders working on WordPress sites.

  • WP Tools
  • Admin bar toggle
  • Admin / front switcher
  • Smart page editor
  • Role switcher
  • Theme switcher
  • ACF Tools
  • Theme & plugin detector
  • Update backlog
  • Admin menu search
  • Hide admin notices
  • Classic Customizer
  • Sidebar shrink

WP Tools panel

What: A floating panel for admin shortcuts, detection, backlog, notices, and switchers on WordPress tabs.

Why: Keep WordPress builder chores in one place instead of hunting admin screens.

How: Enable WP Tools on a WordPress tab while logged in. Most actions work with normal WordPress admin access. Role switcher and Theme switcher need the optional helper plugin below.

  • Hide / show admin bar
  • Dashboard & View site
  • Edit page / Smart editor
  • Scan theme / plugins
  • Additional CSS
  • Role switcher
  • Theme switcher
  • Shrink sidebar
  • Copy report

ACF Tools

What: Copy field names and PHP snippets from Advanced Custom Fields contexts.

Why: Faster handoff between admin UI and theme/plugin code.

How: Enable ACF Tools in the WP Tools toggles on an ACF screen.

Role switcher

What: Preview the site as one sample user per role, then switch back.

Why: Check editor / customer / subscriber views without juggling accounts.

How: Needs Aligner WP Tools Helper (or an existing trusted user-switching link).

Theme switcher

What: Privately preview installed themes in your browser only.

Why: Compare themes without changing the public active theme for visitors.

How: Requires Aligner WP Tools Helper; reset when finished.

Admin menu search

What: Filter the left wp-admin menu instantly.

Why: Find settings deep in crowded admin UIs.

How: Enable Admin menu search while in wp-admin.

Hide admin notices

What: Clean wp-admin of noisy notices; restore when needed.

Why: Focus on the screen you’re editing.

How: Toggle Hide admin notices from WP Tools.

Sidebar shrink

What: Collapse the WordPress admin sidebar for more canvas.

Why: Builder and editor work feels less cramped.

How: Use Shrink sidebar from the WP Tools panel or toggle.

Aligner WP Tools Helper

Optional WordPress plugin bundled inside Aligner and in GitHub Releases. Install it only when you need the advanced switcher features. Requires WordPress admin access with permission to upload and activate plugins.

Needs the helper
  • Role switcher — securely switch to one sample user per role and switch back, when the site does not already provide a trusted user-switching link.
  • Theme switcher — privately preview installed themes in your browser only, without changing the public active theme for visitors.
Works without the helper
  • Admin bar toggle, Dashboard / View site, Smart page editor
  • Theme & plugin detector, Update backlog, Admin notices
  • Classic Customizer, Admin menu search, Sidebar shrink, ACF tools

After download: WordPress Admin → Plugins → Add New → Upload Plugin → choose the ZIP → Activate → reload the site page in Aligner.

Workspace

Hide what you do not need. Keep what you use. Visibility only changes the popup — saved feature settings stay intact when you turn a group back on.

  • All tools
  • Designer
  • WordPress
  • QA
  • Minimal

Click a preset to spotlight matching tool groups above.

In action

Real captures of Aligner tools on a live page. Click any image to enlarge.

Aligner Home welcome dashboard
Aligner Home — welcome dashboard & tool guide
Aligner Settings general and workspace
Aligner Settings — workspace & per-tool controls
Responsive device preview beside the Aligner tool grid
Responsive — device preview beside the tool grid
WP Tools panel with quick actions
WP Tools — quick actions & detection
Pixel rulers over a page with Aligner popup
Rulers — pixel-perfect edges
Element Inspector box model
Inspect — box model & details
Media Manager scanning page images
Media — scan & download assets
Accessibility Checker score
Accessibility — audit score
Page Speed Score metrics
Page Speed — Core Web Vitals
Design System typography tokens
Design System — tokens & exports
Color Picker sampling a page color
Color Picker — HEX, RGB, HSL
Palette Generator with page colors
Palette — extract page colors
Design Check typography issues
Design Check — consistency scan
Wireframe Generator preview
Wireframe — structural preview
Cache Cleaner settings
Cache Cleaner — site data cleanup
Page Load Timer metrics
Page Load Timer — milestones
Page Controls toggles
Page Controls — disable elements

Install in under a minute

Chrome Web Store listing may come later. Until then, load the open-source ZIP like any developer extension.

Download the package

Grab aligner.zip from this page or GitHub Releases.

Unzip somewhere permanent

Do not delete the folder after install — Chrome loads the extension from that path.

Load unpacked

Open chrome://extensions, enable Developer mode, click Load unpacked, and select the unzipped folder that contains manifest.json.

Open Aligner Home

Pin the icon, open a page, then use the popup footer Home link — or Settings → Workspace → Open Aligner Home.

Stay up to date

Chrome only auto-updates extensions from the Chrome Web Store. For the GitHub ZIP build: download the latest release, replace your unpacked folder contents, then click Reload on chrome://extensions.

Who it’s for

Same toolkit, different jobs. Each row is a real friction point — and the Aligner tools that clear it. Screenshots are from the live extension, not mockups.

1/11

UI & layout designers

Measure once. Align for real.

The problem: Eyeballing gaps, baselines, and columns until “close enough” ships as almost-right.

What Aligner solves: Rulers, guides, grids, and Measure so spacing, columns, and alignment are pixel-clear on the live page.

Aligner grids and rulers over a live page
Grids & rulers — measurement for aligned layouts

Responsive & breakpoint work

Preview device widths without leaving the page.

The problem: Resizing the browser window is clumsy, and DevTools device mode is overkill for a quick layout check.

What Aligner solves: Responsive mode frames common device widths beside your tools so you can catch wrapping, overflow, and breakpoint bugs fast.

Aligner Responsive device preview beside the tool grid
Responsive — device preview beside the tool grid

Front-end polish & inspect work

Understand the box without drowning in DevTools.

The problem: You need box model, type, and spacing on one element — not a full console session.

What Aligner solves: Inspect for live structure, CSS, contrast, and typography so you can fix what’s on screen, fast.

Aligner Inspect showing box model and element details
Inspect — box model and element details

Structure & wireframe reviews

See the bones of the page in one click.

The problem: Visual noise hides hierarchy — it’s hard to judge layout structure when every image and color is shouting.

What Aligner solves: Wireframe turns the live page into a grayscale structural view so spacing and blocks are obvious.

Aligner Wireframe grayscale structural preview
Wireframe — structural page preview

Media, content & marketing folks

Pull the images you already see on the page.

The problem: Hunting assets in Network tabs, CMS libraries, or “save image as…” when you just need what the page is already loading.

What Aligner solves: Media Manager scans the page and lets you review and download images without leaving the tab.

Aligner Media Manager scanning page images
Media — scan and download page assets

Brand, color & visual QA

Sample real colors from the live UI.

The problem: Guessing HEX values from screenshots or outdated style docs while the shipped page has drifted.

What Aligner solves: Color Picker and Palette Generator pull HEX / RGB / HSL from what’s actually rendered.

Aligner Color Picker sampling a page color
Color Picker — HEX, RGB, and HSL from the page

Accessibility reviewers

Catch a11y issues before they ship.

The problem: Manual spot-checks miss contrast, labels, and structure problems until a late audit or user report.

What Aligner solves: Accessibility Checker runs an automated audit with severity filters so you can prioritize real fixes.

Aligner Accessibility Checker score and issue summary
Accessibility — audit score and issue summary

Performance-minded designers

See how heavy the page feels, on the page.

The problem: Speed regressions hide until someone opens a separate Lighthouse run or waits on CI.

What Aligner solves: Page Speed surfaces Core Web Vitals and a performance score while you still have the live design open.

Aligner Page Speed Core Web Vitals metrics
Page Speed — Core Web Vitals and score

QA, builders & anyone testing forms

Isolate bugs. Fill forms. Clear stale cache.

The problem: Retyping fake form data, fighting popups or scripts, and wondering if you’re still seeing a cached build.

What Aligner solves: Page Controls (including Fake Filler), Cache Cleaner, and load timing so tests stay honest and fast.

Aligner Page Controls toggles for testing
Page Controls — Fake Filler and temporary test toggles

WordPress developers & builders

wp-admin without the hassle stack.

The problem: Role checks, theme peeks, ACF field names, noisy notices, and a crowded sidebar — all while you’re trying to ship a page.

What Aligner solves: WP Tools for role switcher, theme switcher, ACF Tools, menu search, hide notices, sidebar shrink, smart editor, detector, and more — in one panel.

Aligner WP Tools panel with quick actions
WP Tools — quick actions without leaving the page

Designers working with AI IDEs

Hand Cursor, Claude, or Codex the real design system.

The problem: AI tools invent tokens because nobody exported what the live page actually uses.

What Aligner solves: Design System scans typography, color, and components, then exports DESIGN.md / SKILL.md you can drop into an IDE.

Aligner Design System tokens and export options
Design System — DESIGN.md and SKILL.md for AI IDEs

FAQ

Straight answers for install, privacy, and WordPress.

Is Aligner free?

Yes. Aligner is free and open source under the MIT License.

Does it upload my browsing data?

No analytics or account system ships in this project. Settings stay in Chrome storage on your device. See PRIVACY.md.

How do I update after installing from ZIP?

Download the newest aligner.zip from Releases, replace the files in your unpacked folder, then hit Reload in chrome://extensions. Watch the GitHub repo for release notifications. Store auto-update will apply once a Chrome Web Store listing exists.

What is the WordPress helper plugin?

Optional. Most WP Tools work with normal admin access. Role switcher and private Theme switcher need Aligner WP Tools Helper (ZIP bundled in the extension and Releases). Install via Plugins → Add New → Upload.

Will it slow my browser?

Tools run on the tab where you enable them. Use Workspace presets to hide groups you do not need so the popup stays light.

Is this affiliated with Google or WordPress.com?

No. Independent project by Gobinda Tarafdar. Chrome is a trademark of Google LLC. WordPress is a registered trademark of the WordPress Foundation. WPBakery is a product of Rain-Task Ltd.

About the maker

Portrait of Gobinda Tarafdar

Gobinda Tarafdar

WordPress product marketer · stubborn problem-solver · lifelong Harry Potter devotee

By day I am the Product Marketing Specialist at WPBakery, the page builder that quietly powers a sizeable corner of the WordPress universe. Before that, I helped a single plugin cross 400,000+ active users.

When the day-job owl flies home, I tinker on my own workshop of spells. Aligner is one of them — a visual toolkit so designers and WordPress builders can measure, inspect, and ship without juggling a dozen tabs.

Also from the workshop

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Slack Agent Bridge MCP bridge for Cursor/Claude, local archive, automations
Broken Link Checker Find broken links without leaving the page — local Chrome toolbox

If it saves you a trip to DevTools, give it a star

Aligner is MIT-licensed and ships without ads or tracking. A GitHub star helps others find it. A small donation keeps the workshop lit.