How It Works

  1. Upload — drop images onto the drop zone, click to browse, or paste from your clipboard (Ctrl/Cmd+V).
  2. Crop (optional) — for a single image, hit the Crop button to trim edges or lock to a 1:1, 16:9, 4:3, or 3:4 aspect ratio before compression.
  3. Configure — set a target width, maximum file size in KB or MB, output format, and optional quality.
  4. Preview — for single images, use the quality slider to compare the original against the compressed output live.
  5. Convert — click "Convert & Download All" to process and save your images.

Compress to an Exact File Size

Most image converters let you pick a format and hope for the best. Sukat lets you set a hard ceiling — say, 200 KB — and binary-searches for the highest quality setting that fits underneath it. If your target is still exceeded at quality 1, it reduces dimensions as a last resort, so you always get a file that meets your limit.

Use Auto mode (quality 0) to let the tool optimise automatically, or drag the slider to a fixed value between 1 and 100 for manual control. In manual mode, if the chosen quality produces a file larger than your target, the download button disables until you lower quality or raise the ceiling.

Common File Size Targets

Different platforms and forms enforce different file size caps. Some common targets:

Set your target in KB or MB and Sukat lands underneath it automatically.

Supported Formats

Input: JPG, PNG, WebP, GIF, AVIF, HEIC/HEIF, and any format your browser can decode.
Output: WebP (default — smallest files), JPEG, or PNG.

HEIC & iPhone Photo Conversion

iPhones store photos in HEIC format by default — great for storage, but Windows, Android, and most email clients can't display them. Drop HEIC files in, pick JPG or PNG as the output, and get a universally compatible image back. Conversion happens locally, so you can process an entire camera roll without uploading a single photo. Works for both single files and batch conversions, including Live Photos exported from your iPhone.

Quality Slider

The quality slider appears when a single image is selected and the output is WebP or JPEG. Set it to Auto (0) to let the tool find the best quality that fits your file size limit, or drag it to a specific value (1–100) for manual control. If the chosen quality produces a file larger than your limit, the download button stays disabled until you adjust.

Crop Before You Compress

Uploaded one image? A Crop button appears next to the filename. Open it to drag the corners of a selection rectangle, move the rectangle around, or lock to a preset aspect ratio (Free, 1:1, 16:9, 4:3, 3:4) — handy for profile pictures, thumbnails, banners, or documents that need a specific shape. Use arrow keys for precise 1-pixel nudges, or Shift+arrow for 10-pixel jumps. Click Apply Crop and the cropped image replaces the original in the file list, so the rest of the pipeline uses the new framing.

Cropping happens at the image's native pixel resolution, so you don't lose sharpness in the kept region. The cropped file is saved as PNG if the source was PNG (transparency preserved) or JPEG otherwise. It all runs in your browser — nothing is uploaded.

Remove Background

Single image selected? A Remove BG button appears beside Crop. Sukat runs a client-side AI model (first use downloads a ~40 MB model that caches for next time) to isolate the subject and produce a transparent PNG. Apply it or hit the Revert button if you don't like the result — the original file is preserved.

Batch Processing & ZIP Download

Add multiple images at once — each file is processed and downloaded individually. The quality slider and live preview are available only in single-image mode; batch conversions always use Auto quality to find the best fit for each file independently.

When you have more than one image queued, a "Download as a single ZIP file" option appears. Leave it checked to get all compressed files bundled into one compressed-images-<timestamp>.zip. Uncheck it to keep the original one-file-at-a-time behaviour.

Works Offline

Once the page has loaded, Sukat keeps working even if your Wi-Fi drops. All compression, resizing, HEIC decoding, and ZIP packaging happens in your browser — no server round trips at any point. Open the page on a plane, on the subway, or at a conference with flaky Wi-Fi, and it still resizes and zips your photos without issue.

Why Convert to WebP?

WebP images are typically 25–35% smaller than equivalent JPEGs with no visible quality loss, making them ideal for websites, social media, and email. Every modern browser supports WebP natively — Chrome, Firefox, Safari, and Edge have rendered it for years. If you're compressing images for web publishing, WebP is almost always the right output choice.

Output File Naming

Converted files are named [original-name]-compressed.[ext]. A file called photo.png becomes photo-compressed.webp. After downloading, the image source clears automatically so you can start fresh with the next batch.

← Back to the app