Manage, sign, and secure PDFs with total privacy
Merge, split, compress for government portals, sign, and redact sensitive data with zero server exposure.
Organization & Assembly
4 toolsMerge PDF
Combine multiple PDF files into one clean document in seconds.
Split & Extract
Extract specific pages, separate ranges, or split long files into single pages.
Images to PDF
Convert photos or scans into a clean PDF document with A4 layout.
PDF to Images
Render full pages into sharp PNG or JPG images at high resolution.
Security, Formalities & Privacy
6 toolsCompress PDF
Compress heavy files under 2 MB for government websites without losing clarity.
Redact & Censor PDF
Permanently remove IDs, signatures, and personal details by overwriting pixels.
Sign & Stamp PDF
Draw your signature, generate calligraphy rubrics, or stamp date seals on any page.
Protect & Encrypt
Lock your PDF with a password so only authorized people can open it.
Flatten Forms
Lock filled forms and signatures so nobody can alter the content.
Watermark & Foliate
Add CONFIDENTIAL stamps or page numbers to your documents.
Merge, split, and sign PDFs without touching the internet
Simple tools to handle official forms, contracts, and paperwork without hassle. Combine multiple files, reduce file size to submit to public portal limits, and sign right on your screen.
Engineered to resolve your everyday paperwork in seconds, with instant downloads and zero subscriptions or page caps.
Merge & Organize Pages
Combine multiple PDFs into a single file, reorder pages, or extract only the sheets you need.
Compress for Official Portal Limits (< 2 MB)
Reduce the file size of heavy documents so public administration websites accept them on the first try.
Redact Sensitive Data & Sign
Permanently destroy private information so it cannot be recovered, and sign documents on desktop or mobile.
Frequently asked questions about PDF documents
Uploading files with personal info (tax IDs, bank accounts, or signatures) to cloud converters leaves copies on external servers you do not control. CoreBasics runs entirely inside your browser, so your files never leave your computer.
Government portals and official job applications often enforce strict file size limits (commonly 2 MB or 5 MB). Our compressor trims image size and optimizes document structure so it passes upload limits while keeping text and signatures crisp.
In most PDF readers, drawing a black box just hides the text visually—anyone can still select, copy, or remove the box. CoreBasics permanently deletes the text and pixels underneath so nobody can ever recover them.
A fillable PDF form lets anyone edit text fields after you send it. Flattening locks the document, turning form fields and signatures into permanent pages that no one can tamper with.