How much can I reduce an image file?

Typically 50-80% size reduction. A 3 MB JPEG becomes 500-800 KB at quality 80 with virtually no visible difference.

Will compression affect image dimensions?

No. Compression only reduces file size — the image dimensions (width × height) remain unchanged.

What quality setting should I use for web?

75-80% is the industry standard for web images. At this level, most people cannot detect any quality difference.

Can I compress multiple images at once?

Batch compression is available with FileSwiftly Pro. The free tool compresses one image at a time.

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Q: Which image formats are supported?

JPEG, PNG, WebP and GIF. For best results use JPEG for photos and PNG for graphics with transparency.

Reduzca el peso de sus imágenes JPEG, PNG y WebP manteniendo una calidad óptima.

~2–8 secondes Réduction : 50–80% JPG, PNG, WebP, AVIF Supprimé après 1h

Arrastre y suelte su imagen aquí

o haga clic para seleccionar

JPEG, PNG, WebP, GIF — Máx 50 MB

Calidad

Baja Alta

75%

Resultados concretos

Ejemplos reales de compresión en archivos típicos

Antes / Después

3.2 MB

Antes

0.8 MB

Después

75% reducción media

75%

reducción media

tiempo medio

Reducción según el modo

JPEG 80% −70 a −75%

Antes

100%

Después

28%

PNG −60 a −70%

Antes

100%

Después

35%

WebP −75 a −80%

Antes

100%

Después

22%

"Mis fotos de 3 MB bajan a menos de 300 KB sin diferencia visible. ¡Increíble!"

Conexión segura HTTPS

Archivo eliminado en 1h

50.000+ archivos/día

Procesado en menos de 30s

How to compress an image online without quality loss?

Image compression reduces file size by 50 to 80% while preserving visual quality. FileSwiftly optimises your JPEG, PNG, WebP and GIF files directly in your browser with no installation required. The result: lighter images that load faster on the web.

JPEG, PNG and WebP compression

For JPEG photos, a quality level between 75 and 85% is the standard used by Google, Facebook and Twitter — visually indistinguishable but 60–75% lighter. For PNG images (logos, screenshots), lossless compression reduces size by 20–40% without changing a single pixel. The WebP format achieves up to 30% additional compression over JPEG at equivalent quality — ideal for modern websites.

Why optimise your website images?

Images account for an average of 60% of a web page's weight. Unoptimised images slow loading, hurt Google PageSpeed scores, and degrade user experience. Reducing image weight directly improves your SEO ranking, Core Web Vitals (LCP), and conversion rates.

Batch image compression with FileSwiftly Pro

The free plan compresses one image at a time. FileSwiftly Pro allows compressing up to 50 images simultaneously, exporting to WebP or AVIF, and accessing the REST API to automate compression in your development workflows.

FAQ

What quality setting should I use?

75–85% is optimal for most web uses. Below 60%, compression artifacts become visible in smooth areas.

Does compression change image dimensions?

No. Compression only reduces file weight, not dimensions (width × height). Use our Resize tool to change dimensions.

Which image formats are supported?

JPEG, PNG, WebP, and GIF as input. Output keeps the same format. Use our Image Converter to change formats.

¿Necesitas más?

Comprime hasta 50 imágenes a la vez con Pro

Procesamiento por lotes Exportar WebP y AVIF Acceso a API REST

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