What image formats can I compress and convert?

You can read JPEG, PNG, WebP, AVIF, BMP, TIFF, GIF, SVG, HEIC, and HEIF, then export to JPEG, PNG, WebP, AVIF, BMP, TIFF, GIF (static), or ICO.

Can I compress hundreds of images at once?

Yes. PixelForge is built for bulk jobs (100–500+ images) with concurrent worker processing limited by your CPU cores.

How does the max and min file size targeting work?

After resizing, PixelForge lowers quality until the file is under your maximum size. If the result is below your minimum size, it raises quality again for a better balance.

Does PixelForge work offline?

Yes. After the first load, the Progressive Web App shell can work offline so you can keep compressing without a network connection.

PixelForge — Free Bulk Image Compressor (No Upload)

Tool workspace · originals stay local

Drop images or folders here

JPEG, PNG, WebP, AVIF, BMP, TIFF, GIF, SVG, HEIC/HEIF — processed in your browser. Add more anytime; originals stay in the queue after download.

Add filesAdd folder

Bulk-ready for 100–500+ images · offline after first load

Settings

Resize fits inside max dimensions, then targets a size range with quality retries.

Output format

Max width (px)Max height (px)

Maximum file size

Compress until the file is at or under this size.

Minimum file size

If output is too small (over-compressed), raise quality again. 0 disables.

Starting quality82%

Enforce minimum quality

Floor35%

Compression preset

Output filename patternTokens: {name} {ext} {width} {height} {index}

Your queue is empty. Add images to begin.

Add images, then start processingShortcuts: Enter · Space · Esc · D · T

Loading compressor…

Why creators use PixelForge

A free online bulk image compressor designed for privacy, speed, and predictable output sizes—ideal for web performance, marketplaces, and large photo folders.

100% private processing

Images are decoded, resized, and compressed on your device. Nothing is uploaded to a server, cloud bucket, or analytics pipeline.

Built for bulk jobs

Drop folders or multi-select hundreds of photos. A CPU-aware Web Worker pool keeps the UI responsive while jobs run in parallel.

Exact size targeting

Set a maximum file size and an optional minimum. PixelForge auto-tunes quality—and gently reduces dimensions only when required.

Modern formats

Convert mixed JPEG/PNG/WebP/AVIF/BMP/TIFF/GIF/SVG/HEIC inputs into JPEG, PNG, WebP, AVIF, BMP, TIFF, GIF, or ICO. Transparency is preserved when the output format supports it.

How to compress images in bulk

Four steps from folder drop to ZIP download—no account and no waiting on an upload queue.

1
Add files or an entire folder to the queue.
2
Choose format, dimensions, quality, and min/max file size.
3
Start processing — watch progress, pause, resume, or retry.
4
Download individually or as a ZIP. Reprocess anytime with new settings.

Image compression FAQ

Straight answers for people searching for a private, free, bulk image compressor that works without uploading files.

Are my images uploaded to a server?+

No. PixelForge is a client-side image compressor. All work happens in your browser using Web Workers, Canvas/OffscreenCanvas, and local files only.

What formats are supported?+

Input: JPEG, PNG, WebP, AVIF, BMP, TIFF, GIF, SVG, HEIC, HEIF. Output: JPEG, PNG, WebP, AVIF, BMP, TIFF, GIF (static), ICO. Unsupported files are skipped with a clear notice.

Will aspect ratio be preserved when resizing?+

Yes. Images fit inside your max width and height without cropping or stretching. Defaults are 800×1000 px.

Can I use this offline?+

After the first visit, PixelForge can run from the cached app shell as a Progressive Web App, so compression still works without a network.

Is PixelForge free?+

Yes. There is no account, watermark, or upload quota—because there is no upload pipeline to pay for.

Privacy-first by design

PixelForge never sends your photos to a backend API, never stores them in cloud storage, and never requires an account. That makes it a strong choice when you need to compress images online without uploading—for client work, ID scans, product catalogs, or personal archives. Processing stays on-device with automatic quality retries, ZIP export, and reprocess support so you can tune results without selecting the same folder twice.