Articles about working with PDFs
32 tool articles and 16 practical guides in English and Russian.
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48 articles found
Tool articles
Every card shows its real status: an available tool can be opened now, while an in-development article documents a future workflow without promising a release date.
Edit PDF online
Add text, images, signatures, annotations and forms to a PDF. Existing text is edited only when the document passes the capability check.
Read article →Merge PDF online
Combine up to 10 PDFs into one document while preserving page size, orientation and searchable text.
Read article →Split PDF online
Split one PDF by page ranges, selected pages, every page or fixed-size groups and download PDF or ZIP results.
Read article →View PDF online
Open a validated PDF in the browser with thumbnails, zoom, rotation and text search.
Read article →OCR PDF online
Recognize Russian and English text in scanned PDFs with self-hosted Tesseract and create a searchable PDF result.
Read article →Compress PDF online
Reduce PDF file size while choosing a clear balance between visual quality and compression.
Read article →Watermark PDF online
Add a text or image watermark to selected PDF pages with predictable placement and opacity.
Read article →Add PDF page numbers online
Add page numbers with a chosen format, position, margins and starting number.
Read article →Organize and crop PDF online
Crop margins, reorder, rotate or remove PDF pages with a visual preview and precise values.
Read article →Sign PDF online
Use a focused flow to place a typed, drawn or uploaded visual signature in a PDF.
Read article →Password protect PDF online
Set a password for opening a PDF and configure supported document permissions.
Read article →Unlock PDF online
Create an unencrypted copy of a PDF after entering its current open password.
Read article →Redact PDF online
Permanently remove selected areas together with hidden text and active content.
Read article →Compare PDF online
Compare two PDFs by text, pixels and page structure without changing the sources.
Read article →PDF security report online
Get a factual report about PDF encryption, forms, actions, JavaScript, attachments and metadata.
Read article →Convert PDF to JPG online
Convert selected PDF pages to JPG images with configurable resolution and image quality.
Read article →Convert JPG to PDF online
Combine one or more JPG images into a PDF with a chosen order, page size and margins.
Read article →Convert PDF to PNG online
Convert selected PDF pages to lossless PNG images at a chosen resolution.
Read article →Convert PNG to PDF online
Combine PNG images into one PDF with ordering, page size and margin controls.
Read article →Convert images to PDF online
Build one PDF from JPG and PNG images with local preparation and safe upload.
Read article →Convert PDF to PDF/A online
PDF/A is temporarily disabled for the public beta pending another generator license review.
Read article →Rotate PDF online
Rotate selected PDF pages by 90, 180 or 270 degrees and confirm their orientation in the thumbnail preview.
Read article →Delete PDF pages online
Remove unwanted pages from a separate PDF copy and review the remaining order before export.
Read article →Reorder PDF pages online
Rearrange PDF pages by moving thumbnails and review the final sequence before download.
Read article →Extract PDF pages online
Extract selected pages or ranges from a large PDF into a separate document without changing the source.
Read article →Create PDF forms online
Add interactive text fields, checkboxes and lists, then validate field names before exporting the PDF.
Read article →Annotate PDF online
Add notes, highlights and graphical marks over a page while keeping the source PDF unchanged.
Read article →Add an image to PDF online
Place PNG or JPEG images on a selected page, resize them and review page boundaries before export.
Read article →Flatten PDF online
Convert interactive fields and annotations into regular page content for stable viewing and printing.
Read article →Remove PDF metadata online
Inspect and remove metadata, attachments and other hidden information before sharing a PDF.
Read article →Repair PDF online
Inspect a damaged PDF structure and create a readable copy only after safe recovery checks.
Read article →Deskew PDF online
Correct small skews in scanned pages before OCR so that text lines can be recognized more consistently.
Read article →Practical guides
Detailed guides to formats, OCR, editing, accessibility, printing, privacy and safe file handling.
PDF privacy and temporary processing
How temporary PDF processing works, why the service does not create a permanent file library, and when sources and results are deleted.
Read article →How files are stored and deleted
Source/result lifecycle, manual deletion, idle timeout, hard maximum and download grace.
Read article →How OCR works
Digital, scanned and mixed pages, Russian/English Tesseract, confidence, manual review and searchable output.
Read article →Passwords, redaction and PDF security
Encryption, viewer permissions, unlock, irreversible redaction and factual security reporting without absolute claims.
Read article →Four PDF text editing modes
Overlay, guarded direct edit, existing-text patch and OCR patch: what changes and why the modes stay distinct.
Read article →Is my PDF scanned or searchable?
This guide helps distinguish a digital PDF from a scan or mixed document before editing. Simple search and text-selection checks show whether OCR is needed.
Read article →Why can’t I edit text in this PDF?
A PDF may resist editing because of a scan, embedded font, unusual encoding, password or digital signature. This guide identifies the cause and selects a safe fallback.
Read article →How to prepare a scan for accurate OCR
OCR quality depends on orientation, skew, sharpness, contrast, language and page structure. Preparing a scan reduces uncertain words and shortens manual review.
Read article →How to review and correct OCR results
A searchable PDF produced by OCR must be checked visually and through its digital text layer. This guide finds errors in names, numbers, tables and reading order.
Read article →How to reduce PDF size without visible quality loss
PDF size depends on images, fonts, repeated objects and internal structure. This guide reduces the file while reviewing page quality instead of relying only on a compression percentage.
Read article →How to share a PDF without leaking hidden data
Safe PDF sharing includes visible data, metadata, attachments, comments, forms, active content and password checks. Drawing a black rectangle over text is not sufficient.
Read article →Electronic vs digital signatures
A signature image, a simple electronic signature and a certificate-based digital signature solve different problems. This guide separates visible approval, identity checks and integrity controls without making legal promises.
Read article →PDF/A vs regular PDF: which format should you use?
PDF/A is designed for long-term archiving and restricts some regular PDF features. This guide explains when to choose it and why changing a filename extension is not a conversion.
Read article →How to make a PDF accessible
An accessible PDF needs logical structure, correct reading order, language, alternative text and understandable form fields. A visually tidy page is not accessible by itself.
Read article →How to preserve fonts and layout when editing a PDF
PDF layout depends on embedded fonts, precise object geometry, wrapping and the source export. This guide uses small verifiable edits and compares the result before it is accepted.
Read article →How to prepare a PDF for printing
Before printing, check page size, orientation, margins, cropping, fonts, images and sheet order. On-screen viewing does not reveal every issue that becomes visible on paper.
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