🖼️ Images: JPG, PNG, WEBP, HEIC, HEIF, GIF, SVG, BMP, TIFF🎞️ Videos: TS, MKV, MP4, MOV, AVI, WEBM, FLV🎵 Audio: MP3, WAV, AAC, FLAC📄 Documents: PDF, Excel, CSV, JSON, Markdown, HTML

Universal File Converter & Lossless Compressor

Batch convert and compress images, PDFs, and media files to reduce file size. 100% client-side offline processing with zero server uploads.

Drop Files here, or Click to browse

Supports batch processing of Images, Videos, and Documents simultaneously

How to Convert and Compress Files for Free with OmniConvert?

1. Add Files: Drag & drop your images (HEIC, JPG, PNG, WebP, SVG), videos (MP4, MOV, WebM), PDFs, or data spreadsheets (Excel, CSV, JSON) into the dropzone above, or press Ctrl+V to paste files and screenshots directly.
2. Choose Format or Mode: Select your target conversion format (e.g. HEIC to JPG, MP4 to GIF, PDF Merge) or toggle 'Lossless Compression Mode' to shrink file sizes without quality loss.
3. Instant Local Processing: Click 'Convert' to process files instantly in browser memory using WebAssembly & multi-threaded Web Workers with zero server transmission.
4. Download: Download your converted files individually or packed in a convenient ZIP archive.

Over 50+ Formats Supported: Batch Conversion & Lossless File Compression

OmniConvert is the all-in-one single-page universal file converter and lossless compressor designed for every workflow:
• Image Conversion & Size Compression: Batch convert Apple HEIC / HEIF to JPG / PNG, WebP to JPG / PNG, SVG rasterization, PNG to ICO Favicon, lossless image size reduction, and automatic EXIF GPS privacy stripping.
• Video & Animated GIF: Convert MP4 / MOV / AVI / WebM to optimized high-fps animated GIF, or extract audio tracks to MP3 / WAV / AAC.
• PDF Tools & Multi-Image Bundling: Combine multiple photos into a single PDF, merge multiple PDF documents offline, and extract PDF pages to high-resolution JPG / PNG.
• Data & Document Conversion: Convert Excel spreadsheets (.xlsx, .xls) to CSV, JSON and XML beautification / minification, and HTML to Markdown.

Why 100% Offline & Private Matters? In-Memory Zero-Trust Security

Unlike conventional online converters that upload your confidential contracts, sensitive photos, and company spreadsheets to remote cloud servers, OmniConvert runs entirely inside your browser's in-memory WebAssembly (WASM) sandbox. Your files never touch external storage or leave your device. It works seamlessly even when disconnected from the internet, delivering military-grade zero-trust privacy.

Featured Guides & Conversion Knowledge Base

Curated format tutorials and privacy architecture deep dives

View All Guides

Why Offline WebAssembly is the Only Truly Safe Way to Convert

Understanding cloud conversion privacy hazards vs local in-memory WASM execution.

iPhone HEIC to JPG Batch Conversion Guide Without Software

Convert Apple HEIC photos to compatible JPG/PNG instantly while stripping EXIF GPS tags.

Free Offline PDF Merge & Split Tutorial

Combine sensitive corporate contracts and scans locally without cloud servers.

How to Convert Video to High-Quality Optimized GIF

Master palettegen filters and FPS downsampling to produce lightweight, crisp GIFs.