PDF compression changes little? Check structure versus scanned images
Understand what PDF structure compression does, compare actual size and page content, and avoid treating object-stream saving as image downsampling or a target-size compressor.
KitNelo Blog
Documents & OCR · Practical guides
Turn separate PDFs and screenshots into usable material. Learn document merging, image text recognition and checks to make before sharing. Step-by-step help with office work, creative tasks and digital life. Choose a method, understand its limits and check the result.
Practical guides
Export PDF pages as PNG: check count, order and small text
Render every PDF page to PNG and download a ZIP. Verify page-001 filenames, image count, orientation and legibility, with clear limits on rendering scale and searchable text.
How to rotate a sideways PDF: check whole-file and mixed page orientations
Save a 90, 180 or 270 degree PDF rotation and inspect the downloaded file. Understand whole-file rotation limits, mixed page directions, and the difference from OCR or print layout.
Extract Specific PDF Pages and Check the File Before Sharing
Create a PDF containing selected pages, distinguish file positions from printed page numbers, and check ranges, order, content and filenames. Page extraction does not replace redaction.
Scanned PDF text cannot be copied? Create and check a searchable PDF
Identify image-only scans, create a searchable PDF and TXT with the scan workbench, then check search, copying order and recognition errors without overwriting the original.
How to turn multiple images into one PDF and check page order
Combine JPG, PNG or WebP photos into one PDF using PDF tools. Prepare materials, correct page order and check readability, page dimensions and the final upload size.
How to merge multiple PDFs and check the final document
Combine PDFs locally, arrange files and verify the final page order. Learn when to use page editing and what to check for scans, encrypted files and digital signatures.
How to extract text from images with OCR and proofread it
Extract Chinese and English text from screenshots or photos with local batch OCR. Prepare images, export TXT and check common errors, reading order and table limitations.
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