Free Online Image Resizer
Resize images to exact pixel dimensions or percentages - with aspect-ratio lock
使い方
- 1Upload an image
Drop or select a JPG, PNG, or WebP file.
- 2Pick target size
Enter width and height (or scale %) - or choose a preset like 1080×1080 (Instagram) or 1280×720 (YouTube thumbnail).
- 3Download the resized image
Save the resized file. Original aspect ratio is preserved unless you unlock it.
Free Online Image Resizer について
Free online image resizer. Change any JPG, PNG, or WebP to an exact width and height, or scale by percentage, with optional aspect-ratio lock. Presets for Instagram, YouTube thumbnail, Twitter card, and other social sizes. Runs entirely in your browser. 712 Tools の Free Online Image Resizer はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。
デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。
よくある質問
Will resizing lose quality?
Downscaling is lossless in perception - the resizer uses high-quality bilinear resampling. Upscaling always loses sharpness; for that, an AI upscaler is a better tool.
Does the output format match the input?
By default yes. Optionally export a resized PNG as JPG or WebP for smaller file size.
What are the social presets?
Instagram square (1080×1080), Instagram story (1080×1920), YouTube thumbnail (1280×720), Twitter/X post (1600×900), LinkedIn banner (1584×396), and Facebook cover (820×312).
Are my images uploaded?
No. Resizing runs in your browser via the Canvas API.
続きを読む
How to blur part of an image online (free, no upload, no watermark)
The safe way to blur a face, license plate, credit card number, or address in a screenshot - with a browser-based blur brush that never uploads your image. Includes the mistakes that make blur reversible, and why pixelation is often the safer choice.
Canva's AI image generator is the best thing to happen to solo game devs - here's the honest review
I finally sat down with Canva Dream Lab (the one built on Leonardo Phoenix) to make a game logo, and it changed my mind about AI art for indie devs. Here's what it's actually good at, where it falls apart, and the tiny stack of free tools that turns its output into ship-ready assets.
The best free background remover that doesn't upload your image (2026)
Most "free" background removers upload your image to a server, cap you at three edits, and stamp a watermark on anything the free tier is allowed to keep. Here's the actual free option in 2026 - how it works, what quality to expect, and where it beats and loses to remove.bg, Canva and Photoshop.
The best free physics editor alternatives for 2D game devs in 2026
Every 2D game needs collision shapes, and every paid physics editor charges you for them. Here's what a physics body editor actually does, what to look for in a free one, and how the current free options - desktop and browser - stack up in 2026.
YouTube thumbnail sizes 2026: dimensions, HD download, and design that gets clicked
Every YouTube thumbnail resolution YouTube stores, the maxres trap, and the design rules that separate 3% click-through videos from 12% ones.
WebP vs JPG in 2026: why WebP won, and when JPG is still right
WebP files are 25-35% smaller than JPG at the same visual quality. Every browser supports it. Every CDN serves it. Here's why the JPG-vs-WebP debate is over - and the two edge cases where JPG still wins.
The best free tools for content creators in 2026 (no signup, no watermark)
Free tools for TikTok, Reels, YouTube Shorts, and Instagram - screen recording, hashtag research, sound effects, fancy fonts, resizing - that don't demand your email or slap a watermark on your work.
How to compress images without losing quality (JPG, PNG, WebP in 2026)
The math behind JPG quality, why WebP is now the smarter default, and the settings that give 60% file-size savings with no visible quality loss.
Every social media image size you actually need in 2026
TikTok, Reels, Shorts, Instagram, X, YouTube, LinkedIn, Facebook, Pinterest - the current image and video dimensions, updated for 2026, in one bookmarkable list.
Favicon and app icon complete guide 2026 (every size, every platform)
The favicon.ico that still matters, the apple-touch-icon that isn't optional, the PWA icons that make you installable, and the iOS + Android sets your app needs on day one.
関連ツール
Screen Recorder
Record your screen, tab, or window with audio - save as MP4 or WebM, no install, no watermark
Webcam Recorder
Record video from your webcam with mic audio - private, no upload
Voice Recorder
Record voice memos, podcasts, or narration - save as WebM audio
Image Compressor
Compress JPG, PNG, and WebP images with adjustable quality - private, in-browser
Image Converter
Convert between PNG, JPG, and WebP in your browser - batch supported
YT Thumbnail
Download YouTube video thumbnails in every resolution - HD and Max-Res