File & Format Converters · Free tool
Image Resizer
Scale JPG, PNG, or WebP photos by exact pixels or percentage while keeping the aspect ratio. A free, instant online resizer that works offline with no signup required.
Updated June 2026
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What it does
A free image resizer that runs entirely in your browser. Resize by exact pixels or by percentage, with aspect ratio locked by default. Pick your output format (PNG for lossless, JPG or WebP for smaller files) and download. No upload, no watermark, no queue.
Common targets: 1200×630 for Open Graph social previews, 1080×1080 for Instagram, 1920×1080 for desktop wallpapers, 2000px on the long edge for high-quality blog hero images. When in doubt, match what the platform suggests — you’ll avoid their server-side recompression artefacts.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/image-resizer" width="100%" height="720" frameborder="0" loading="lazy" title="Image Resizer" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Drop your image into the upload box.
- Set a target width and height, or use the Percent slider.
- Keep 'Lock aspect' on unless you mean to stretch the image.
- Pick an output format and click Resize.
When to use this tool
- Sizing photos for social media (1080x1080 Instagram, 1200x630 Open Graph).
- Reducing oversized images before email or website upload.
- Resizing screenshots to fit a documentation layout (typically 1280px wide).
- Preparing icons / avatars at specific dimensions (256x256, 512x512).
When not to use it
- Cropping (removing parts of the image) — use the image cropper tool instead.
- Vector graphics — SVG scales infinitely; rasterizing first then resizing loses quality.
- Bulk batch resizing of hundreds of images — use desktop tools (XnConvert, ImageMagick).
Common use cases
- 12 MP phone photo (4032×3024) resized to 1920×1440 for blog hero image.
- Group photo resized to 1080×1080 for Instagram post.
- Logo resized from 2000×1000 down to 600×300 for email signature.
- Screenshot resized from 2560×1440 to 1280×720 for documentation insertion.
Frequently asked questions
- Does the resizer keep aspect ratio?
- By default yes — enter one dimension and the other is calculated. Toggle 'free' mode to resize independently, which distorts the image.
- Which formats can I resize?
- JPG, PNG, WebP, and GIF. Animated GIFs resize to the first frame only; use a dedicated GIF editor for animation-preserving resize.
- What quality setting should I use for JPG?
- 80–85 is the modern sweet spot — near-invisible quality loss with 50–70% file size savings. Below 70 you'll see artifacts in detailed areas.
- Is the image uploaded anywhere?
- No. Resizing runs in your browser using the Canvas API. Your file never leaves the tab.
- What are the standard sizes for social media images?
- Instagram: 1080x1080 (square post), 1080x1350 (portrait post), 1080x1920 (story/reel). Twitter / X: 1200x675 (post), 1500x500 (header). Facebook: 1200x630 (link share), 820x312 (cover). LinkedIn: 1200x627 (post share), 1584x396 (banner). YouTube thumbnail: 1280x720. Pinterest: 1000x1500 (vertical pin). TikTok cover: 1080x1920. Open Graph (universal social preview): 1200x630 with text staying within 1080x568 safe area. Always upload at exact platform size to avoid auto-cropping. Platforms recompress aggressively, so upload high-quality and let them downsample.
- Should I upscale images?
- Generally no — upscaling can't add detail that wasn't captured. Standard upscaling (nearest neighbor, bicubic) just makes images look soft and blurry. AI-based upscalers (Topaz Gigapixel, Adobe Super Resolution, Real-ESRGAN) hallucinate plausible details and look better than basic upscalers, especially for photos with recognizable subjects (faces, animals, landscapes). For text in images, upscalers can introduce errors. For most uses, downloading or capturing the image at the resolution you need is preferable to upscaling. If you must upscale, use AI tools and inspect for artifacts.
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- Design & Media · GuideHow to resize images without losing qualityResize images without quality loss — Lanczos vs bicubic, downscale tips, AI upscaling limits, web/print sizes, batch tools. Free guide, no sign-up.
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- Design & Media · GuideHow to compress images without losing qualityCompress images without losing quality — pick the right format, dimensions, and quality settings to shrink files fast. Free online guide, no signup.
- Design & Media · GuideHow to choose image formatsAnalyze JPG, PNG, WebP, AVIF, and SVG trade-offs with our free, browser-only guide. Instant format recommendations for quality, size, and compatibility.
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