Fix Your File Size Instantly & Securely
Resize and compress your documents, photos, and PDF files to strict limits like 20KB, 50KB, or 100KB. Processed 100% in your browser—your files never leave your device.
Resize & Compress Images
Resize Image to 10KB
Compress your image size down to 10KB or less online in seconds. Perfect for strict document uploads.
Resize Image to 20KB
Instantly reduce JPG, JPEG, or PNG sizes to 20KB or less with optimized canvas compression.
Resize Image to 30KB
Shrink file sizes to exactly 30KB while keeping high visual quality for government portals.
Resize Image to 50KB
Quickly optimize and scale your images under 50KB. Perfect for online applications.
Resize Image to 100KB
Reduce photo sizes to 100KB or less for resume uploads and general job submissions.
Resize Image to 200KB
Adjust image file sizes to under 200KB to match portal standards without loss of detail.
Resize Image to 500KB
Compress large high-resolution photos down to 500KB to save device storage or web page loads.
Aadhaar, Passport & Messenger Tools
Photo Resize for Aadhaar
Crop and resize passport photos to 3.5cm x 4.5cm and under 50KB for Aadhaar registration.
Passport Size Photo Maker
Convert and crop photos into standard 2x2 inch or 3.5x4.5cm passport sizes under 50KB.
Compress Image for WhatsApp
Shrink image dimensions and file sizes specifically for fast loading on WhatsApp chats.
Compress & Convert PDF Files
Compress PDF to 100KB
Shrink PDF file sizes under 100KB for strict online web portals and email submissions.
Compress PDF to 200KB
Compress digital or scanned PDFs to 200KB or less without uploading data to remote servers.
Compress PDF to 500KB
Downsize PDF files containing rich text or scans under 500KB using smart browser encoding.
Compress PDF to 1MB
Reduce PDF file size to 1MB or less. Keep report documents clear and readable.
Compress PDF for WhatsApp
Decrease PDF sizes for easy sharing via WhatsApp document message protocols.
Aadhaar PDF Compress
Safe and local compression for Aadhaar card PDFs, with browser-side decryption password utility.
Convert & Combine Files
Merge Aadhaar Front & Back
Merge separate front and back images of your Aadhaar card into a single page JPEG or PDF document.
JPG to PDF Converter
Convert and compile multiple JPG/JPEG images into a single professional PDF file.
Image to PDF Converter
Merge different image types (PNG, JPG, WebP) into a single PDF document in the browser.
PDF to JPG Converter
Extract all pages of your PDF document as separate JPEG files, download in a ZIP file.
Why Choose ResizeKB?
Most online converters require uploading your sensitive documents—like passports, national identification cards, and resumes—to remote servers. This poses severe data privacy and security risks. ResizeKB performs 100% browser-side processing. Your documents are parsed, resized, and encoded locally on your computer or mobile phone. Your data never leaves your device.
Frequently Asked Questions
Yes. ResizeKB runs entirely client-side. We use your browser's processing engine (Canvas API and JavaScript memory) to resize images and PDFs. Because there is no server upload, your sensitive personal documents (like Aadhaar cards, passport photos, and certificates) remain entirely private on your device.
ResizeKB loads lightweight open-source engines (PDF.js and PDF-Lib) directly in your browser. When you select a PDF, the browser renders its pages onto an invisible canvas, compresses the canvas drawing into an optimized JPEG structure, and packs those JPEGs back into a brand new PDF file, all within local memory.
Many government, job application, and admissions portals require files to be under specific file sizes (e.g., photos under 50KB or PDFs under 200KB). We automate the trail-and-error process by running a binary search on the quality parameters until the file meets the exact limit.
Absolutely. ResizeKB is designed mobile-first. It is extremely fast, lightweight, and works on Safari (iOS), Chrome (Android & iOS), and standard mobile browsers without needing any app installations.