# HelloResizer

> Free online file resizer for images, videos, and PDFs. 100% browser-based — no uploads, no accounts, complete privacy.

## About

HelloResizer (helloresizer.com) is a free, privacy-first web application that resizes files entirely in the user's browser. No files are ever uploaded to any server. The tool uses the Canvas API for images, FFmpeg WebAssembly for videos, and pdf-lib for PDFs.

## Key Features

- **100% Client-Side Processing**: All resizing happens in the browser. No server uploads, no data collection, no cookies.
- **Image Resizer**: Resize JPG, PNG, WebP, GIF, SVG, AVIF, BMP, and TIFF images. Supports batch processing with ZIP download.
- **Video Resizer**: Resize MP4, WebM, MOV, and AVI videos to any resolution using FFmpeg WebAssembly.
- **PDF Resizer**: Change PDF page dimensions to A4, Letter, A3, A5, Legal, Tabloid, or custom sizes.
- **Resize Modes (Images)**: By exact pixel dimensions, by percentage, or by longest edge with aspect ratio lock.
- **Video Resolutions**: 4K (2160p), 1440p, 1080p, 720p, 480p, 360p, or custom width/height.
- **Format Conversion (Images)**: Convert between JPEG, PNG, and WebP while resizing.
- **Quality Control**: Adjustable quality slider for lossy formats (JPEG, WebP).
- **Batch Processing**: Upload and resize multiple files at once, download individually or as ZIP.
- **No Account Required**: No sign-ups, no emails, no paywalls.

## Available Tools

- [Image Resizer](https://helloresizer.com/image-resizer): Bulk image resizer supporting all major formats
- [Resize JPG](https://helloresizer.com/resize-jpg): Resize JPEG/JPG images
- [Resize PNG](https://helloresizer.com/resize-png): Resize PNG images with lossless quality
- [Resize WebP](https://helloresizer.com/resize-webp): Resize WebP images
- [Resize GIF](https://helloresizer.com/resize-gif): Resize GIF images
- [Resize SVG](https://helloresizer.com/resize-svg): Rasterize and resize SVG vector images
- [Resize AVIF](https://helloresizer.com/resize-avif): Resize AVIF next-gen images
- [Resize BMP](https://helloresizer.com/resize-bmp): Resize BMP bitmap images
- [Resize TIFF](https://helloresizer.com/resize-tiff): Resize TIFF images
- [Video Resizer](https://helloresizer.com/video-resizer): Change video resolution
- [Resize MP4](https://helloresizer.com/resize-mp4): Resize MP4 videos
- [Resize WebM](https://helloresizer.com/resize-webm): Resize WebM videos
- [Resize MOV](https://helloresizer.com/resize-mov): Resize MOV/QuickTime videos
- [Resize AVI](https://helloresizer.com/resize-avi): Resize AVI videos
- [PDF Resizer](https://helloresizer.com/pdf-resizer): Resize PDF page dimensions

## Technology

- Built with Next.js 14, TypeScript, and Tailwind CSS
- Image processing: Browser Canvas API with Web Workers
- Video processing: FFmpeg compiled to WebAssembly (@ffmpeg/ffmpeg)
- PDF processing: pdf-lib (client-side PDF manipulation)
- Analytics: Plausible (privacy-respecting, no cookies)
- Hosting: Vercel CDN

## Privacy

- No files are uploaded to any server
- No cookies are set
- No personal data is collected
- Plausible Analytics is used for anonymous page view counts only
- Full privacy policy: https://helloresizer.com/privacy

## Contact

- Website: https://helloresizer.com
- Email: hello@helloresizer.com