All the Tools You Need, All in One Place

ToolKnox is your all-in-one hub for FREE online tools. Simple, powerful, and fast—get everything you need in one place.

Youtube Kit

Image Tools

Stop copy-pasting the same post into 10 different apps.

Post your content to X, Instagram, Facebook, LinkedIn, YouTube, TikTok, Threads, Bluesky, Pinterest, and Telegram simultaneously with a single click.

buy now

Manage multiple brands and clients from one dashboard.

Each profile has its own connected accounts, content calendar, and posting history — so nothing ever gets mixed up.

video test

Frequently Asked Questions

Frequently Asked Questions (FAQs) is a list of common questions and answers provided to quickly address common concerns or inquiries.

No. Every operation runs entirely in your web browser using the Canvas API. Your images never leave your device and are never sent to any server. This also means the tool works offline once the page has loaded.

The quality slider controls how aggressively the encoder compresses the image. A value around 75–85 is typically indistinguishable from the original by eye but can reduce file size by 50–70%. PNG ignores the quality slider because it is a lossless format — every PNG output is fully lossless regardless of the slider position.

How It Works

Three steps from raw image to perfectly sized, compressed output.

Upload Your Images

Drag and drop one image or an entire batch. JPG, PNG, WebP, GIF, AVIF, SVG, and HEIC (iPhone) are all accepted. Up to 50 files at once.

Set Your Options

Choose an output format, drag the quality slider to control file size, and pick a resize mode — pixels, percentage, or a social media preset.

Download Converted Files

Click Convert to process everything in your browser. Download each file individually or grab all converted images in a single ZIP.