NullKit

PDF tools · Free browser tool

Local OCR and Searchable PDF Maker

Recognize English printed text in scanned PDF pages locally and create a new image-based PDF with an invisible searchable text layer.

Phone and computer friendly No document upload Free to use

Private workspace

Turn an image-only scan into a searchable review copy without uploading the document or sending its text to an AI service.

Local processing
Tab memory only New output file Review before sharing

Your file is processed by code already loaded in this tab. Your device, browser, extensions, downloads, and any later sharing remain part of the trust boundary.

Ready. Choose a file to begin.

The output is a new image-based PDF with hidden recognized text. Keep the original document.

Choose a file to begin

Turn an image-only scan into a searchable review copy without uploading the document or sending its text to an AI service.

What this tool does

A focused PDF job, with a visible boundary.

Turn an image-only scan into a searchable review copy without uploading the document or sending its text to an AI service.

01

Same-origin English OCR model

02

Searchable text layer and extracted TXT

03

Page-by-page local progress and output receipt

Know the limits

Local does not mean unlimited.

Browser processing avoids an upload workflow, but available memory, PDF structure, digital signatures, and the settings you select still matter.

  • This first version recognizes English printed text and can make mistakes, especially with handwriting, columns, low-resolution scans, unusual fonts, or rotated pages.
  • Pages are rebuilt as images with a hidden OCR text layer; original links, forms, tags, attachments, signatures, vectors, and accessibility structure are not preserved.
  • The searchable text can contain recognition errors and must not be treated as an authoritative transcription.

Four local steps

How to use searchable pdf ocr.

  1. 01

    Choose an unsigned scanned PDF.

  2. 02

    Select the pages and OCR resolution.

  3. 03

    Run local recognition and wait for every selected page.

  4. 04

    Search, copy, and inspect the output before relying on it.

Clear answers

Searchable PDF OCR questions.

Does OCR upload the PDF or recognized text?

No. The OCR worker, English language data, and PDF processing assets are served by NullKit and run in the current browser.

Does it preserve the original PDF structure?

No. Selected pages are rendered and rebuilt as image-based pages with an invisible searchable text layer. Keep the original file.

Can it recognize handwriting or every language?

Not reliably. This initial release is for English printed text. Handwriting and other languages are outside its stated support.