Start with one file.
Open an HTML or ZIP file, or paste code. No project handy? Explore the sample instead.
01Import your projectNo file yet? Start with the sample.Expand / collapse source⌄
↥Drop your HTML or ZIP here
Choose a file to start a local check.
10MB max · Extracted 30MB / 200 files✓ No account✓ No project uploads✓ Free local checks
index.html
LOCAL CHECK
1 Read file→2 Inspect structure→3 Review findings
Choose a file or paste HTML to begin.
● Current: local HTML checks · Project files are processed on this device.Live URL audits & public hosting: unavailable
02Project reviewReady when you are
! Errors—
△ Needs review—
✓ Passed—
Resolution progressAfter your first check
Performance, full accessibility & runtime need manual reviewFindingsPriority order
☷Know what to fix.
Run a check to see your findings in priority order.
Page preview375px
Your page, right here.
Start with your HTML or ZIP.
STATIC · ISOLATEDStatic preview · Scripts & network blocked
What to review here
Change width and inspect wrapping and horizontal scrolling. Selecting a finding highlights its element when available. Test live behavior and external assets in your deployment environment.
Fix assistantFIX FLOW
SELECT A FINDING
A clear next step.
Choose a finding to see its cause, source location and recommended fix.
Edit basic metadata
Session history 0
- Stored in this session only.
03 Reviewed. Ready to export.Your original file is never overwritten.
Coverage: basic HTML, SEO, accessibility patterns and ZIP paths. No synthetic performance scores; automated checks are not launch certification. Embeds are static iframes with scripts and network blocked.
Understand the signal.
See errors, review items and passes, then inspect the source location and visual preview.
Review before you apply.
Compare your source before and after, then apply. Recheck, undo and export without leaving the workspace.
How are local checks different from server audits?
This version processes your project in browser memory. Server Lighthouse audits, public file hosting, collaboration and payments are unavailable. External link availability is not tested. Findings are informational.
Why are scripts disabled in the preview?
To isolate uploaded HTML, scripts, form submission and external network requests are blocked. Static CSS and images in your ZIP are connected. Test real app behavior in your own deployment environment.
Privacy notice
Project HTML and ZIP files are not uploaded to an operator server. Source and history are cleared on refresh. Only your theme preference is stored on your device. ZIP support loads JSZip from jsDelivr; Google ads may use cookies and connection information.
Google · Advertising privacyAbout & free usage
An independent free webpage preflight tool. Local checks, previews, fix prompts and exports require no account or payment. Unaffiliated with Google, Tiiny Host or WordPress. No guarantees of security, search rankings or accuracy.