Image Converter

Convert images between PNG, JPG, WEBP, AVIF, and BMP formats instantly in your browser. 100% client-side with zero data upload.

Drop images here or click to browseSupports: PNG, JPEG, WEBP, AVIF, BMP, GIF
🛡️Zero server logs. Image conversion runs 100% inside your browser. Your files never leave this tab.
🛠️Developer Tool Belt
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Image Converter

Image Converter is a 100% browser-based tool for converting images between popular formats. All processing happens locally via Web Workers — your images never leave your device.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Convert Images Online

  1. Drag and drop an image or click to select from your device.
  2. Choose the target format (PNG, JPG, WEBP, AVIF, or BMP).
  3. Adjust quality for lossy formats, then click Convert to get your result.

Frequently Asked Questions

Got questions about image conversion? We've got answers.

Is Image Converter safe to use with sensitive images?

Yes, absolutely. Image Converter runs entirely in your browser via Web Workers. Your images are never uploaded to any server — all processing stays within your browser tab.

What image formats are supported?

You can convert between PNG, JPG (JPEG), WEBP, AVIF, and BMP formats. Input supports all these formats plus GIF.

Is there a file size limit?

Since processing happens in your browser, the limit depends on your device's memory. Most modern browsers can handle images up to 100MB without issues.

Automated E2E Test Suite Logs

Our build systems validate edge-case processing under extreme conditions before each deployment.

Stability
100.0%
Passed
16/16
Env
V8-Sandbox
Engine: Vitest RunnerUpdated: 2026/6/13 02:40:10📦 Download Test Datasets
PASSConvert Operation SUPPORTED_OUTPUT_FORMATS should include all expected formats
PASSConvert Operation SUPPORTED_OUTPUT_FORMATS should not contain duplicate entries
PASSConvert Operation SUPPORTED_OUTPUT_FORMATS should have at least 5 supported formats
PASSConvert Operation convertImage (unit mock test) should be an async function
PASSConvert Operation convertImage (unit mock test) should throw on unsupported format
PASSConvert Operation convertImage (unit mock test) should use OffscreenCanvas for conversion
PASSConvert Operation convertImage (unit mock test) should apply quality mapping for lossy formats
PASSImageConverterTool renders dropzone when empty
PASSImageConverterTool renders format buttons
PASSImageConverterTool renders Convert button
PASSImageConverterTool renders privacy strip
PASSImageConverterTool has multiple file input
PASSImage Worker — Convert Action should return error for unknown action
PASSImage Worker — Convert Action should handle convert action with valid payload
PASSImage Worker — Convert Action should handle convert action with missing file
PASSImage Worker — Convert Action should handle multiple actions in sequence
⏱️ 0.18ms📦 1.5KB🎚️ Max Nesting: 3🌿 AST Nodes: 48🛡️ V8 Heap: Healthy
$ codecaven-validator --scope=tool● CLUSTER COMPLIANT

Tool Changelog & Updates

v1.1.02026-06-12
  • Feature: Batch image conversion — supports multiple files with format selection and quality control per batch.
  • Fix: Fixed double-encoding bug in format conversion — now shares the same single-pass encode pipeline as the compressor for accurate output sizes.
  • Refactor: Extracted shared encodeImage helper used by both compressor and converter — one fix covers both tools.
v1.0.02026-06-11
  • Feature: Initial release with image format conversion between PNG, JPG, WEBP, AVIF, and BMP — 100% client-side via Web Worker.
  • UX: Drag-and-drop upload zone with instant image preview and format selection grid.
  • UX: Quality slider for lossy formats (JPG, WEBP, AVIF) with real-time size comparison.
  • Security: Web Worker isolation ensures zero data uploads — all processing stays in the browser.