Loading...
Please wait a moment
Disruptive full-fledged PDF editor and redaction suite that runs completely in your browser with zero cloud uploads. Add custom text with font styling, highlight sensitive paragraphs, draw freehand annotations, stamp signatures, and apply true irreversible black-box redaction that physically eliminates underlying text and sensitive metadata.
Strict specification adherence across modern web standards, character encodings, and verified mime protocols.
Practical transformation samples demonstrating verified input structures and formatted expected outputs.
Selecting your source PDF documents for instant client-side manipulation.
Uploaded local file: `financial_report_2026.pdf` (3.4 MB)Processed file ready for instant zero-latency download without remote server upload.Identify syntax exceptions, formatting anomalies, and browser execution limits with verified solutions.
Root Cause: The target PDF has active user or master encryption preventing unauthorized read/write streams.
Resolution: Unlock the PDF using the required passphrase before attempting modifications.
Root Cause: Processing gigantic multi-gigabyte scans in a single 32-bit browser memory heap.
Resolution: Process files in smaller batches or compress images within the document prior to processing.
Unlike traditional SaaS utilities that transmit your files to remote cloud buckets, codeYB developer tools execute 100% inside your browser environment using modern web standards.
Files, keys, and data strings never transit over external networks. All computations occur within isolated Web Workers and memory buffers that flush immediately upon tab closure.
Compiled WebAssembly binaries and native browser APIs (Canvas, WebCrypto, TypedArrays) provide near-native C/Rust speed without server bottlenecks or network latency.
Once the static assets load, the processing engine operates completely independent of internet connection. No API tokens, subscriptions, or paywalls required.
How modern SaaS platforms handle high-throughput document processing, multi-tenant isolation, and background queuing without data leakage.
Client-side computation engine powered by modern WebAssembly and native Web APIs.
True Irreversible Redaction: Black-box redaction permanently eliminates underlying text and metadata
Inline text editing with font styling (Helvetica, Times Roman, Courier, size, color, bold, italic)
Freehand drawing pen with custom stroke colors and widths
Highlighter tool and rectangle shape markers with custom opacity
Draw digital signatures or insert custom stamp logos onto any page
Multi-page navigation, 90-degree rotation, and 50%-200% zoom controls
100% Client-Side Privacy: Your confidential contracts and tax documents never touch a server
Follow these simple steps to process your files securely in seconds.
Upload your confidential PDF or click "Try Sample PDF" for instant testing.
Use the text tool to add notes, draw signatures, or drag black boxes to redact sensitive PII/numbers.
Click "Download PDF" to serialize and download your sanitized, edited document.
Got questions about data safety, limitations, or browser processing? Find answers below.
No! Unlike amateur editors that merely paint a transparent overlay, codeYB draws physical opaque redaction rectangles directly into the PDF rendering streams.
No! All processing runs 100% inside your local browser memory using WebAssembly and canvas.
No limits! Edit multi-page documents completely free without subscriptions or watermarks.
Draw or upload your digital signature to sign contracts and PDF agreements.
Reduce PDF file size while optimizing image quality for email attachments.
Stamp custom text or image watermarks onto PDF pages to protect copyright.
Rotate individual or all pages in a PDF document 90, 180, or 270 degrees.
Combine multiple PDF documents into a single consolidated master PDF file.
Separate single PDF pages or extract page ranges into new PDF files.
Remove unwanted or duplicate pages from your PDF document.
Generate professional invoice, certificate, and agreement PDF templates online.
Lock and password protect PDF documents with strong encryption and permission controls.
Explore how high-performance systems and algorithms powering tools like this are built for production.
Leveraging React 19 Server Components for streaming SSR, zero client bundle weight, and hardware acceleration.
Use this tool in your technical documentation, developer blogs, team wikis, or academic research with full editorial attribution.