CamLabs.ai

CamLabs.ai is a free web tool that checks redacted PDFs to see if text remains hidden underneath black boxes.

CamLabs.ai is a free online utility designed to check whether redacted PDFs actually hide the text beneath black boxes. Users drop a PDF file into the browser, where local code inspects the document entirely on the user's device without uploading any files. The tool checks for text under boxes by rendering pages and analyzing selectable text, detects invisible text such as white text or hidden OCR layers, identifies unapplied redaction marks, and inspects saved document metadata like titles and authors. It runs client-side for privacy, allowing users to disconnect from the internet after the page loads. The site also promotes Redactly AI for permanent redaction on Mac, iPhone, and Android.

CamLabs.ai at a glance

Best for: Software engineer, Writer, Support
Runs on: Web
Pricing: Free
Released: October 2026
Category: AI productivity tool
Website: camlabs.ai

Key features

Detects text sitting under solid boxes
Finds invisible or white text
Flags unapplied redaction marks
Inspects document metadata and details
Runs entirely in the web browser
Keeps files local with no uploads

Use it for

Check if redacted PDFs still allow text copying
Verify unapplied redaction marks in documents
Inspect hidden document metadata and details

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