Step 01: Upload or paste a URL
Upload a single image, a ZIP pack, or a public URL list in the workspace.
Free · No signup · Exact KB target
Set a KB target, upload your image, and download a compressed result — free, no account, no watermark.
Reduce file size without losing quality
Drag & drop files here
Or click to browse (up to 15 MB)
Shrink images to an exact file size in three steps — single, bulk ZIP, or URL.
Upload a single image, a ZIP pack, or a public URL list in the workspace.
Set the output target or pick a preset, then let the server optimize the image.
Download the JPEG or ZIP result from the finished session.
I made this useful when a form or marketplace rejects a file that is too large.
You can aim at a real KB target instead of guessing from a vague save button.
Bulk ZIP flow saves time when you need the same squeeze across a folder.
A URL flow lets you test a public image without downloading it first.
The output stays focused on file size instead of adding extra editing steps.
See what Compress is built to change — static marketing mock, not a live edit.
Large original
Target size met
Meet hard KB limits on government and school portals.
Shrink photos so they clear mailbox size gates.
Fit product shots to platform upload caps.
Prepare screenshots and icons under size rules.
Formats, processing, and practical limits for this tool.
Compression is a size reduction workflow, so a very small target can force visible quality loss or a failed squeeze when the image is already close to the limit.
Straight answers about this tool — privacy, formats, limits, and how processing works.
Yes. Single-file drag-and-drop, bulk upload, and URL fetch all send image data to the ImageToolkit FastAPI backend for compression. Optional prep work like crop, rotate, and resize runs in your browser first. Images are processed for the request and are not saved to a permanent gallery.
Common input formats include PNG, JPG/JPEG, WEBP, BMP, GIF, and TIFF. Compressed output is JPEG so ImageToolkit can reliably reach your target file size.
Single uploads, each file in bulk uploads, and URL-fetched images are limited to 15 MB per image. Combined bulk uploads are limited to 50 MB total, and URL fetches time out after 10 seconds.
No. ImageToolkit does not keep a permanent library of uploads. Images are processed in memory for the compression request and deleted afterward. There is no account system and no browsable gallery.
Exact target size is useful when a form, email system, or marketplace enforces a hard KB limit. A vague compress button may still fail those checks. With ImageToolkit you aim for 150 KB, 200 KB, or whatever your limit requires.
Yes. Upload a single file, queue up to 20 files for bulk ZIP compression, or paste up to 20 public image URLs when the files are already online.
Yes. ImageToolkit is free to use with no signup required and no paywall. You can also run it locally with the open-source frontend and FastAPI backend.