PixyTool
100% In-Browser Privacy
Diff Tool • PixyTool•100% In-Browser

Compare PDF Files Online Free

Spot contract revisions, edited clauses, and text differences side by side in seconds.

Zero Server Uploads
Lossless Quality
Instant Local Processing
100% Client-Side Privacy:Your files stay safe on your device and are never uploaded to any server.

Drop 2 PDF files to compare, or click to browse

Select Original PDF and Revised PDF for side-by-side diff

3D Isometric Visual Showcase of PixyTool PDF Suite and Page Organizer
Aether PDF Suite
Multi-Page Engine • 0ms Server Upload
Supported:PDFWatermarkSignatureSplit Pages
Vector PDF Processing

Merge, Split & Protect Documents In Seconds

Manage multi-page PDF documents locally in your web browser. Reorder pages, extract sheets, add digital watermarks, and split large contracts without waiting on cloud queue delays.

Visual Page Reorder & Split

Drag and drop thumbnail pages to reorder or extract specific page ranges instantly.

Bank-Grade Document Privacy

Confidential tax forms, contracts, and IDs stay securely inside your browser memory.

Instant Multi-Document Merge

Combine unlimited PDF files into a single unified archive with 1 click.

Step-by-Step Architecture

How PixyTool Compare PDF Works in 4 Simple Steps

Illustrated step-by-step workflow. Zero server delays, zero data leaks, 100% private in your browser.

Swipe steps:
Step 01
+ Drag & Drop
JPGWebPPDF

Select & Ingest

Choose your PDF document directly from your phone, tablet, or PC.

Zero upload • Loaded in RAM
Step 02
Target Size100 KB
50KB100KB200KB

Precision Parameters

Choose page reorder, merge sequence, stamp watermark, or split page ranges.

Real-time interactive controls
Step 03
WebAssembly Core
0ms Cloud Queue

Local In-Browser Engine

High-speed WebAssembly worker executes compression directly on your CPU.

Zero latency • 100% Client-Side
Step 04
-94% Reduced•94 KB
Download All (ZIP)

1-Click Instant Export

Download your perfectly sized document or save multiple files as a single ZIP.

Full clarity preserved
Pictorial Architecture Comparison

Why PixyTool Is 10x Safer & Faster

See the difference between old cloud upload converters and PixyTool's zero-upload client architecture.

Traditional Cloud Converters

Remote server processing

  • Uploads private documents, IDs, and signatures to third-party servers.
  • Slow upload & download queues on mobile networks.
  • Strict daily file quotas and aggressive subscription paywalls.
  • Risk of permanent cloud storage retention or security leaks.

PixyTool In-Browser EngineRecommended

100% Client-side local execution

  • Zero Server Uploads: Files never leave your browser memory.
  • Instant Speed: Zero network latency, instant conversions.
  • Unlimited & Free: Process unlimited files without signup or limits.
  • Mobile-Optimized: Smooth touch experience across iOS & Android.

Instant Revision and Contract Difference Detection

Review contract revisions, legal documents, and project proposals with confidence. Easily verify whether unannounced changes, altered numbers, or deleted clauses were slipped into a revised PDF.

Engineered for Quality & Performance

Why PixyTool Is The First Choice For Creators

Engineered specifically to solve strict upload constraints for government job forms, exam portals, web developers, and professional photographers.

Feature 1 of 6
01

Exact Target Size (100KB, 50KB, 20KB & More)

Never guess quality settings again. Select your required size (like 100KB or 50KB) and our tool automatically tunes the compression to make sure your photo fits safely under that limit.

02

Crystal Clear Quality (No Blurry Images)

Keep your photos sharp and clear. Our smart compressor shrinks the file size while preserving faces, document text, and signatures so they look just as good as the original.

03

Compress Multiple Photos & 1-Click ZIP

Compress dozens of photos at once without slowdowns. Download them individually or save everything together in one neat ZIP file with a single click.

04

Side-by-Side Before & After Comparison

Check the quality before downloading. Use the interactive split slider to compare your original photo and the compressed version side by side.

05

Convert Between Formats (WebP, JPG, PNG)

Easily convert photos between JPG, PNG, and modern WebP formats. Keep transparent backgrounds for logos or optimize photos for fast web sharing.

06

Instant Speed & Works 100% Offline

Everything happens directly on your device with no waiting for uploads. Once the website is opened, you can even compress images without an internet connection.

3D Illustration of Secure Cyber Safe Vault for local in-browser image compression privacy
100% Private & Safe

Your Personal Photos & Documents Never Leave Your Device

Most online compressor websites upload your sensitive ID cards, signatures, and private photos to unknown remote servers. PixyTool works completely on your phone or computer. Nothing is ever uploaded, stored, or viewed by anyone.

100% PrivateNever UploadedSafe for ID & Signatures
Simple 4-Step Process

How to Compress Images to Exact Size (Under 100KB / 50KB)

Follow these quick steps to shrink your photos to exact target sizes without sacrificing visual clarity.

Step 1 of 4
01
Drop Image or Select File

Upload Your Image

Drag and drop your photos into the upload box or click to select files from your computer, phone, or tablet. You can upload single photos or dozens in bulk.

02
TargetUnder 100 KB

Select Your Target Size (e.g. 100KB or 50KB)

Choose one of our quick target size presets (100KB, 50KB, 20KB) or enter any custom size in KB or MB. Alternatively, switch to manual mode to adjust the quality percentage slider.

03
Original
⮂
94 KB Sharp

Inspect & Compare Visual Quality

Click the "Compare" button on any image card to open our interactive split before/after viewer. Verify sharpness, color accuracy, and file size savings.

04
-98% File Saved
Download Image

Download Compressed Image or ZIP

Download individual files with a single click or hit "Download All (ZIP)" to save all compressed images packaged together in seconds.

Got Questions?

Frequently Asked Questions

Everything you need to know about our image compression technology and file size standards.

Upload both the Original Document and the Modified Document, then click "Compare Documents Now". PixyTool analyzes both texts and displays a line-by-line diff with additions in green and deletions in red.
Category Directory & Related Tools

Explore PixyTool Free Online Tools Directory

Quickly switch between PDF utilities, image compressors, developer tools, video processing, text tools, and calculators. All tools run 100% locally in your browser for unmatched privacy and speed.