Question 1

Are my images ever uploaded to a server?

Accepted Answer

Never. CompressVault runs entirely in your browser using the Canvas API and Web APIs. Your images never leave your device — not even for a millisecond.

Question 2

How does the compression work?

Accepted Answer

For JPEG and WebP, we use the browser's native canvas quality parameter to reduce file size while preserving visual quality. Lossy mode applies aggressive compression similar to TinyPNG. Lossless mode uses format-native lossless encoding.

Question 3

Where are my images stored?

Accepted Answer

Converted images are kept in your browser's IndexedDB storage — a private, sandboxed database that only CompressVault can access. They are automatically deleted after 24 hours.

Question 4

What formats are supported?

Accepted Answer

You can open PNG, JPEG, WebP, AVIF, GIF, BMP, TIFF, and SVG files. You can export to PNG, JPEG, WebP, and AVIF. You can also rotate images 90°, 180°, or 270°, and flip them horizontally or vertically before converting.

Question 5

Is there a file size limit?

Accepted Answer

No. CompressVault places no restriction on individual file size. You can drop a 100 MB RAW photo or a large HEIC straight from your iPhone and it will be processed entirely in your browser. The only practical ceiling is your device's available RAM — very large images may slow down the conversion or cause the browser tab to run out of memory on low-end devices, but that is a hardware constraint, not an application limit.

Question 6

Is there a storage limit?

Accepted Answer

CompressVault imposes no artificial storage limit — but your browser does. Each browser allocates a quota per website based on your device's available disk space: Chrome and Edge typically allow up to 60% of free disk space, Firefox up to 10% or 2 GB, and Safari on iPhone or iPad can be as low as 50–150 MB depending on how full your device is. The storage bar below the upload area always shows how much of your device's budget is currently in use. If it turns yellow or red, download your converted images and remove them from the queue to free space. Images are also automatically deleted after 24 hours.

Question 7

Can I process multiple images at once?

Accepted Answer

Yes. Drop or select multiple images at once and click "Convert All" to batch-process them. Download everything as a single ZIP file.

Question 8

Does CompressVault remove metadata from my images?

Accepted Answer

Yes — automatically. The conversion pipeline draws your image onto an HTML canvas and exports fresh pixel data via the Canvas API. That process only carries pixels, so EXIF data (camera model, GPS coordinates, timestamps), IPTC, and XMP tags are all stripped from the output. The only thing a browser may re-embed is the ICC color profile, which preserves color accuracy across displays but contains no personal information.

Question 9

How do I compress images for free without losing quality?

Accepted Answer

Drop your images into CompressVault and choose Lossless mode to compress without quality loss, or use Lossy mode with a high quality setting (80–90) to achieve significant size reduction with minimal visual difference. Everything runs in your browser — no account needed, no uploads, completely free.

Question 10

How do I convert JPEG to WebP online?

Accepted Answer

Upload your JPEG files to CompressVault, select WebP as the output format, and click Convert. Your images are converted instantly in your browser with no server involved. WebP typically achieves 25–35% smaller file sizes than JPEG at equivalent visual quality.

Question 11

How do I convert WebP to JPG online?

Accepted Answer

Drop your WebP files into CompressVault, choose JPEG as the output format, and click Convert. The conversion happens entirely in your browser — no upload required. You can also adjust the quality slider to control the output file size.

Question 12

How do I convert HEIC to JPG?

Accepted Answer

Drop your HEIC or HEIF files into CompressVault and select JPEG as the output format. The app automatically decodes the HEIC image in your browser and converts it to a standard JPEG — no upload, no app install, completely free. This works for photos taken on iPhone or iPad.

Convert JPG, PNG to WebP — Free & Private No Uploads. No Servers. 100% Browser-Based.

Why CompressVault?