Image Compressor

Compress images privately without uploading

Large photos slow down websites, clog email inboxes, and waste phone storage. The ITCOH Image Compressor shrinks JPEG, PNG, and WebP files right in your browser. Drag a folder of images, tweak quality and max width, preview the result, optionally annotate, then download individuals or a ZIP — without creating an account or sending pictures to a cloud encoder.

What you can do. Batch-compress with a quality slider; pick WebP for the smallest files, JPEG for compatibility, or PNG when you need lossless edges; cap width with presets or a custom size; draw simple annotations before export; and pack everything into a ZIP for one download. Paste from the clipboard when you only have a screenshot. Previews help you stop before quality drops too far.

Why run compression locally. Product shots, ID scans, medical images, and family photos are personal. Many free compressors upload every byte to a server farm. Even temporary storage creates risk: misconfigured buckets, logs, or third-party CDNs. Local compression means the only copy that leaves your machine is the smaller file you intentionally save.

Privacy proof. Watch the Network panel while you compress — you should not see image payloads POSTed to itcoh.com. Processing uses the Canvas API and client-side scripts. Analytics may load for page usage counts, but your photos are not part of that traffic. After first load you can go offline and keep compressing.

When to use it. Preparing blog hero images; resizing screenshots for tickets; packing a ZIP of listing photos; converting a PNG screenshot to a lighter JPEG or WebP before Slack. Combine with Social Image Resizer or WebP Converter when you need exact platform sizes or format-only conversion.

Limitations. Extreme quality settings can introduce banding or blur — always preview. Very large RAW camera files are not the target format; convert to JPEG/PNG first. Browser memory caps apply to huge batches (hundreds of multi‑MB images). Drawing tools are for light markup, not a full photo editor. Animated GIFs and multi-page TIFFs are outside scope. Keep originals until you confirm the compressed set looks right.

Drop files above, set quality and resize, then export. Your images stay on your device the entire time.

Workflow suggestion. Start with quality around 0.8 and a max width that matches your destination (for example 1600px for blog heroes, 1080px for social). Compare the preview against the original thumbnails. If text in screenshots looks muddy, raise quality or switch to PNG. When shipping many assets to a teammate, ZIP export keeps filenames organized without a third-party transfer tool seeing the pixels.

ITCOH’s compressor is intentionally simple: fast defaults, clear controls, and a privacy promise you can verify yourself. Use it whenever you would have emailed an oversized photo album or waited on an upload bar that never needed to exist.