Resize Image
Change the dimensions of your images. Proportions are automatically preserved.
Drag & drop your image here
or click to select
Dimensions (px)
Leave a field empty to preserve proportions.
Presets
How to resize an image online for free?
Resizing an image adjusts its dimensions (width and height) without changing its format. FileSwiftly lets you reduce or enlarge photos in pixels or percentage, with or without aspect ratio constraint, in seconds.
Resize for social media
Each platform has optimal dimensions: Instagram square (1080×1080 px), Twitter/X banner (1500×500 px), Facebook cover (851×315 px), LinkedIn banner (1584×396 px). Our tool offers presets for the most common formats.
Reduce for email sending
A photo from a modern smartphone easily weighs 8–15 MB at 4000×3000 px — far too large for email. Resizing to 1920×1440 px gives sufficient quality for screen display with 80–95% weight reduction.
Maintaining aspect ratio
Enable Keep proportions to avoid distortion: changing width automatically adjusts height and vice versa. For cropping to free dimensions, use our Crop Image tool.
FAQ
Can I enlarge an image without quality loss?
Enlarging beyond the original resolution inevitably creates blur. Our tool preserves existing quality but cannot create non-existent detail. For AI upscaling, see our Upscale tool.
What resolution is needed for printing?
Professional printing requires 300 DPI. For A4 size (21×29.7 cm), that's 2480×3508 pixels.
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