Private image resizer
Resize an image to a chosen width or height, preserve its shape, and export a PNG without uploading it.
A preview and actual dimensions will appear here. Your original is kept.
The image is read and resized in this browser. No image upload occurs. PNG preserves transparency but may be larger than the source. Animated inputs export one still image.
Choose one dimension. Keep the image in proportion.
The tool divides your target width or height by the corresponding original dimension, applies that scale to both sides, and rounds to whole pixels. By default it never enlarges a smaller image. Turn enlargement on only if the receiving service requires those dimensions; it cannot recover detail that is absent from the original.
Output width = round(original width × scale)
Output height = round(original height × scale)
A 4,000 × 3,000 photo resized to 1,200 pixels wide becomes 1,200 × 900. A 600-pixel-wide original remains 600 pixels wide at that setting unless you allow enlargement.
A PNG export is not a file-size target.
The browser creates a new PNG from the resized pixels. PNG is useful for transparency and screenshots, but photographs can become larger than their original JPEG even after resizing. If you need a smaller download, use the compressor and inspect a JPEG or WebP result instead.
Decoding and re-encoding can change colour handling and metadata. This is not a print-production, preservation, animation or forensic metadata-removal tool. Check the preview, retain an original and avoid using it to redact private information. Files are limited to 30 MB, decoded images to 24 megapixels, and output to 8,000 pixels on each side.
Understand resizing versus compression · Compress an image instead.
A few useful answers
Is my picture uploaded?
No. Selection, decoding, resizing and export happen in the browser. Normal site requests still reach our hosting provider, as described in the privacy notice.
Why is the PNG bigger than my JPEG?
PNG uses lossless compression of the exported pixels; JPEG often compresses photographs more efficiently. Use the image compressor for JPEG or WebP output.
Can enlargement make a blurry photo sharp?
No. More output pixels do not recreate missing original detail. Enlargement is disabled by default.
Will it keep animation?
No. The output is a single still PNG. Keep the original animated file.