Overlay two drawing revisions
Superimpose PDF drawings or images
to reveal geometry and position changes.
Visual design revision comparison
Compare and overlay drawing revisions in seconds.
Superimpose PDF drawings, images and technical plans to make revisions, differences and design changes immediately visible — directly in your browser.
Compare PDF drawings and spot revision changes instantly
Load an original drawing and a revised drawing, align them, adjust opacity and overlay both versions to reveal what moved, disappeared or changed. LET'S SPOT IT works with PDF drawings and images and helps you review technical revisions without reopening the source CAD files.
✓
Free during beta.
Your drawings never leave your device.
REVISION A
REVISION B
Revision summary
Geometry
Changed
Position
+15 mm
Status
Review
No CAD required
for visual review
Local processing
inside your browser
No file upload
drawings stay private
No ads
professional environment
See it in action
Compare real drawing revisions visually.
Overlay PDF drawings, images and technical plans, align revisions and make design changes immediately visible.
Align and adjust the comparison
Move, scale, rotate and adjust opacity
until both revisions match precisely.
Explain what changed
Measure, annotate and export the comparison
for customers, suppliers or project teams.
Simple workflow
From revision to decision in minutes.
Skip the unnecessary CAD workflow when all you need is to understand, explain or validate a design change.
01
Open
Load the original drawing and the revised PDF or image directly from your computer.
02
Compare
Overlay both revisions and visually identify geometry, position and design changes.
03
Explain
Add graphical annotations to highlight modifications and communicate them clearly.
04
Decide
Export the result or review it directly with your supplier, customer or project team.
A lighter workflow
Keep CAD for engineering.
You don't always need a full engineering workflow just to understand what changed.
LET'S SPOT IT gives suppliers, technical sales teams, project managers and customers a fast way to review revisions independently.
Traditional workflow
Supplier
→
Customer
→
Engineering
→
CAD
→
Review
With LET'S SPOT IT
Open
→
Compare
→
Understand
→
Decide
Privacy by design
Your drawings stay yours.
PDFs and images are processed locally inside your browser. Your comparison files are not uploaded to LET'S SPOT IT servers for storage or processing.
Only the account, authentication, security and transactional email data needed to operate the online service is handled online.
✓
Local browser processing
✓
No cloud document storage
✓
No document database
✓
No advertising
✓
Local exports
Professional review
Everything you need to review a revision.
Drawing overlay
Superimpose two revisions and control transparency for fast visual comparison.
PDF & image support
Work directly with common technical document formats without converting them to CAD.
Graphical markup
Highlight areas, add visual annotations and make changes easier to communicate.
Alignment tools
Position, scale and align drawings to make revision comparison straightforward.
Local export
Export your review directly to your computer without storing project files in the cloud.
Browser based
Nothing to install. Open the application and start reviewing your drawings.
Beta access
Free during beta.
Get full access to LET'S SPOT IT while the service is in beta. No payment information required.
Beta
Free
Full access during the beta period
- ✓ Full revision comparison
- ✓ PDF and image support
- ✓ Drawing and markup tools
- ✓ Local file processing
- ✓ Local export
- ✓ No advertising
- ✓ Product updates
No credit card required.
See the change. Explain it. Move forward.
Stop turning every design revision into a CAD task.
Compare your first revision