Private Image Converter | Jesus Iniesta

Runs 100% in your browser

No uploads to a server

Converter loads on the first conversion, size estimate, or full format list

Drop an image or click to browse

Most formats work — converted locally.

Output format

HEIC and HEIF uploads are decoded locally. Pick a common format or load the full list below to see everything supported by this ImageMagick build.

All supported formats

Load the ImageMagick engine to reveal every format available in this browser build.

Target resolution

Matches input

The default keeps the input resolution. Switch to custom to resize.

One-click conversion

The ImageMagick WebAssembly engine loads on demand. Once cached, conversions run quickly without leaving your browser.

Tip: the first conversion, size estimate, or format-list load downloads the ImageMagick engine. Later conversions stay on your device.

Best results

Need transparency? Choose PNG or WebP.
Want smaller photos? Try JPG or WebP at quality 70–85.
Need print-ready output? Use TIFF or high-quality PNG.

How to use the image converter

Drop an image into the upload area or choose one from your device.
Select PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, or another extension.
Adjust quality for supported formats and set a custom resolution if needed.
Review the estimated size, convert the file, and download the result.

The first conversion downloads the ImageMagick engine. Once cached, later conversions on this device start much faster.

Convert images without uploading them

Decode HEIC and HEIF photos locally before conversion.
Estimate output sizes before choosing a format.
Keep the original resolution or resize while preserving the aspect ratio.
Load every readable and writable format available in this browser build.

Drop an image, inspect the local preview, and choose the format, quality, and output resolution. The conversion engine runs inside this browser.

Choose the right output format

PNG: lossless output with transparency for interfaces, logos, and diagrams.
JPG: compact photographic output with adjustable quality.
WebP: small modern files for websites, product images, and hero graphics.
AVIF: highly efficient modern compression when the browser build supports it.
TIFF: high-quality output for print and archival workflows.

Need scalable vector paths instead of another raster format? Use the Image to SVG Tracer.

Private conversion with practical controls

Use quality 70–85 as a practical starting point for web photographs.
Keep PNG or WebP when transparency matters.
Resize oversized sources before export to reduce transfer and rendering cost.
Check the downloaded result before replacing a production asset.

The selected source, preview, size estimates, and converted result remain in your browser. No account or remote upload is required.

Frequently asked questions

Can I convert images without uploading them to a server?

Yes. The converter runs inside your browser with WebAssembly. Your source image and converted result stay on your device.

Which image formats can I convert?

Common presets include PNG, JPG, WebP, AVIF, GIF, BMP, and TIFF. Load the full format list to inspect every readable and writable format available in this ImageMagick build.

Can it convert HEIC and HEIF photos?

Yes. HEIC and HEIF inputs are decoded locally, then passed to the browser-based conversion engine for export.

Does the tool compress images or only change the format?

It does both. Formats such as JPG, WebP, and AVIF expose a quality control, and you can also reduce the output resolution.

What quality should I use for the web?

Quality 70–85 is a useful starting range for photographs. Inspect text, fine edges, and gradients in the downloaded result before publishing it.

Is transparency preserved?

Transparency can be preserved when the chosen output format supports an alpha channel, such as PNG or WebP.