# filesconversion - File Format Converter

> Free in-browser image converter: turn PNG, JPG and SVG into WebP or ICO and download instantly. Files never leave your device.

Canonical page: https://www.abdullahkaleem.live/products/filesconversion · Last updated: 22 February 2026

Type: Web tool · Free
Open the tool: https://filesconversion.vercel.app/

## Overview

Minimal, in-browser image conversion for developers. Convert PNG/JPG/JPEG/SVG into WebP or ICO, then download the result instantly.

## The problem

Developers frequently need a quick, secure, and minimal tool to convert standard images into web-optimized formats (WebP) or icons (ICO) without relying on slow, ad-heavy, or privacy-compromising third-party server converters.

## What I built

Developed a completely in-browser image conversion utility using Next.js and native Browser APIs. It supports drag-and-drop, batch processing, and ZIP bundling, with all image processing happening securely on the client side.

## Results

- Successfully implemented 100% local, in-browser image conversion with WebP quality control and selectable ICO sizes.
- Optimized client-side performance for processing tasks, eliminating backend dependency.
- Enhanced user experience by allowing drag-and-drop functionality for multiple files and batch downloads.

## Technical notes

### Architecture

A purely client-side architecture leveraging Next.js for the UI shell, while delegating all heavy lifting (image parsing and formatting) to the browser natively via Canvas and FileReader APIs.

### Technical decisions

- **Processed all images strictly on the client side using Browser APIs.** To guarantee data privacy (files never leave the device), eliminate server processing costs, and provide instant conversions without network latency.

### Challenges and fixes

- **Downloading multiple converted files individually clutters the user's download folder and creates a poor UX.** Implemented a batching mechanism to automatically bundle multiple converted images into a single ZIP file for seamless downloading.

## Built with

Next.js, TypeScript, React, Tailwind CSS, Browser APIs (FileReader, Canvas), Vercel, ESLint/Prettier, Lucide React

## More products

- [Synapce - Cloud Storage Solution](https://www.abdullahkaleem.live/products/synapce): Cloud storage web app: upload files up to 1GB and share a unique link that works on any device without logging in. Files expire after 7 days.