Resize photos in bulk — without uploading them

Drop in a folder of photos, pick a target size, get resized copies back as a zip — nothing is ever uploaded anywhere.

How it works: drop your photos below, set a max width/height (or a percentage), and click Resize. Small images are never enlarged by default.

How to use this tool

Use the dropzone below — that's the whole tool. (The downloaded version is the same tool as a file that opens in any browser, no install or internet needed.)
Drop your photos onto the dropzone, or click it to browse for files.
Set your target: "Fit within max width/height" (default) or "Scale by percentage," plus a quality level and output format.
Click Resize N images. Watch the live grid fill in with before/after sizes as each image finishes.
Click Download all as ZIP to save every resized photo in one file.

Drop photos here, or click to browse

JPEG, PNG, WebP, GIF · multiple files supported

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What is this page?

This is the real Batch Image Resizer — the same tool Untracked sells as a download — running free, right here in your browser. Your files are processed entirely on your own device: nothing is uploaded, no account is needed, and the page makes no network requests after it loads. You can verify that yourself: load the page, open your browser's network inspector, or even disconnect from the internet and keep using it.

Free page vs. the €9 download

Here (free): up to 3 files per day, counted privately in your own browser (localStorage). No cookies, no analytics, nothing that identifies you — the count lives on your machine, and clearing your browser's site data resets it.

The download (€9, once): the same tool as a single HTML file, with no daily limit — it runs offline forever, on any computer you own, even with no internet connection at all. Full details →

Questions people ask

Do my photos get uploaded anywhere?

No. The resizing runs entirely inside this page — no server, no account, no network calls. Works with your Wi-Fi off.

Will resizing reduce image quality?

Re-encoding always loses a little — that's why there's a quality slider (85% default is visually indistinguishable for most uses). "Prevent upscale" keeps small images from being enlarged.

Which formats can it read and write?

Reads anything your browser can open — JPEG, PNG, WebP, and more. Output is JPEG or PNG, your choice, with adjustable quality.

How many images can I do at once?

The downloaded version batch-processes any number and downloads them as one zip. This free page handles up to 3 images a day so you can try it properly.

What's the difference between this free page and the paid download?

This page is limited to 3 images a day and lives on this website. The €9 download is the same resizer as a single HTML file — no limits, offline forever, on any computer.