Audit before filing

Check patent drawings and reference numerals

Audit a drawing PDF or image pages for page boxes, conservative margin zones, weak contrast, FIG labels and reference numerals missing from the drawing or specification.

Run drawing preflight

Completely free No account or payment Image stays on this device

USE THIS WHENUse this before filing or professional review to find page-box, margin, contrast, figure-label and reference-numeral issues.SUPPORTED INPUTOne PDF or up to 20 image pages

What you will getA clear result before technical detail

01A page-by-page drawing preflight report

02Drawing-to-specification reference numeral gaps

03A downloadable JSON evidence record with explicit legal limits

Private analysis labFiles stay inside this browser

PREFLIGHT / 20 PAGES

Choose one drawing PDF or image pagesOne PDF or up to 20 JPEG, PNG or WebP pages · processed locally

Selection is processed locally

Session diagnosticsNo processing errors

Stored only in this browser tab. Image bytes, filenames and metadata are never included.

No tool error has been recorded in this tab.

No upload or account Originals remain unchangedReview methodology

Useful and careful

What is built into the result.

Important findings come first. Technical fields remain available without taking over the page.

Renders PDF pages locally without executing embedded scripts

Uses native PDF text before optional local OCR

Separates automated warnings from filing or legal conclusions

Understand the method

A useful result with its reasoning attached.

This page explains what the lab measures, how to interpret it and where human review remains essential.

A focused preflight before professional or office review

Patent drawing defects are expensive when discovered late. A page can use an unexpected box, place line work inside a margin, contain faint strokes after reduction, skip a figure label or use a reference numeral that never appears in the written description.

The checker renders one PDF or a set of image pages locally. It evaluates A4 and US Letter page boxes, conservative top, left, right and bottom review zones, contrast and dark-area signals. Findings are warnings to inspect, not statements that an office will reject a filing.

PDF or raster pages
A4 and US Letter detection
Conservative margin review
Contrast and blank-page checks

Reference numerals across drawings and text

When the PDF contains selectable text, that text is used directly. Scanned pages can optionally be read with a local English OCR model. Numerals and FIG labels are collected page by page and compared with numerals parsed from the specification text pasted by the user.

A drawing-only number can indicate an omitted written reference, while a text-only number can indicate a missing drawing callout. Both lists can also include legitimate page numbers, dimensions or OCR mistakes, so each remains a review list rather than an automatic defect.

Native PDF text first
Local OCR fallback
Drawing-only numeral list
Specification-only numeral list

What this tool deliberately does not decide

The checker does not evaluate patentability, novelty, enablement, claim scope, drawing necessity or legal strategy. It does not certify that line weights, hatching, symbols or every office-specific convention are correct.

Before filing, verify the current rules of the selected authority and obtain qualified assistance when the application or deadline justifies it. The exported report records the selected profile, page measurements and limitations so a reviewer can reproduce the automated checks.

No patentability opinion
No filing acceptance promise
No automatic document modification
Current rule verification required

Three simple steps

Know what happens before you start.

Use this before filing or professional review to find page-box, margin, contrast, figure-label and reference-numeral issues.

ChooseSelect one drawing PDF or a sequence of raster pages and a filing profile.
Cross-checkRender pages locally and compare drawing numerals with optional specification text.
ReviewTreat page findings as a reproducible checklist, never as legal approval.

RESULT ORDER

01 · A page-by-page drawing preflight report02 · Drawing-to-specification reference numeral gaps03 · A downloadable JSON evidence record with explicit legal limits04 · Limits and next step

Clear before you rely on it

Questions this tool should answer upfront.

Short answers keep important privacy, evidence and professional-use limits visible.

01Will this tool tell me whether the patent office will accept my drawings?

No. It identifies page and consistency issues for review. Filing acceptance depends on the current rules, the complete application and the examining office.

02Is the patent PDF uploaded?

No. PDF rendering, text extraction, optional OCR and report generation occur in the browser. Only normal website files are requested from AnalyzeImage.

03Why can an OCR numeral be wrong?

Thin leaders, hatching, scan noise and small labels can confuse OCR. The page report shows OCR confidence and treats every extracted numeral as review evidence.

Method referencesUSPTO patent application drawing information PCT drawing requirements in MPEP 1825

Continue when useful

Your next step, without starting over.

Move to another page only when its outcome matches what you need.

Check page image sizeUnderstand raster resolution before export.

Important limitations

The report is not legal advice or an acceptance guarantee · OCR and raster margin detection can miss or include marks · Authority rules and office practices can change after this release

Full limitations