Image Resizer (Pad, Crop, Stretch)
Resize any JPEG, PNG, or WebP image to exact pixel dimensions. Choose Pad for letterboxing with transparent borders, Crop for full frame, or Stretch.
Best solution
Local processing: Image Resizer (Pad, Crop, Stretch); Exact pixel dimensions with customizable composition framing.
Choose a file to start. Nothing is uploaded.
Single still image. JPEG uses white behind transparency. Decoder notices
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Methodology & calculation rule
Bilinear/Bicubic Canvas Scaling: Target Width × Target Height with Pad, Crop, or Stretch
Pad preserves entire picture with transparent borders; Crop fills frame by trimming outer edges; Stretch distorts aspect ratio.
All image processing executes client-side within your browser sandbox via HTML5 Canvas and WebAssembly. No photographs, bitmaps, or metadata are ever uploaded to remote servers.
Output files are generated in-memory as local object URLs. Files must be smaller than 20 MB and under 24 megapixels.
Real-World Context & Technical Standards
Pad, Crop, and Stretch Geometry
Pad fits the entire image with transparent borders (pillarbox/letterbox); Crop fills the target canvas by trimming outer edges; Stretch forces exact dimensions with geometric aspect ratio distortion.
Hardware-Accelerated Canvas Scaling
HTML5 Canvas utilizes high-quality multi-pass interpolation algorithms to resample high-resolution master images down to target display dimensions while mitigating aliasing moiré patterns.
Memory Protection Against Canvas Crashes
In-browser canvas buffers are clamped at 24 megapixels (and 16,384 px max dimension) to prevent mobile browser memory exhaustion and hardware GPU crash loops when rendering enormous graphic files.
Related conversions
| Tool | Type | Format |
|---|---|---|
| HEIC to JPG | Diagnostic | JPEG |
| HEIC to PNG | Diagnostic | PNG |
| WebP to PNG | Diagnostic | PNG |
| PNG to JPG | Diagnostic | JPEG |
| JPG to PNG | Diagnostic | PNG |
Frequently Asked Questions
What is the difference between Pad and Crop?
Pad preserves 100% of your source image by adding transparent bars. Crop fills the entire dimension by trimming opposite edges.
Does resizing enlarge low-resolution images cleanly?
Resampling interpolates pixel grids, but cannot synthesize optical detail missing from the original snapshot.