Tools

Photo & File Tools

More than format conversion - compress to a portal's exact size limit, fix red-eye, resize for social platforms, or turn burst shots into a GIF. Every tool runs in your browser, so your files never get uploaded.

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Photo won't upload?

Job portals, university admissions, and government forms often reject photos for file size or format. These tools hit a specific limit or shrink by quality - all in your browser.

Compress under 100KB

The most common portal limit - job applications, admissions, and HR forms.

Compress under 20KB

Tight caps for signatures, passport-style photos, and strict government forms.

Compress JPG by quality

Shrink file size with a quality slider when you don't need an exact KB target.

All target sizes

Under 20KB Under 50KB Under 100KB Under 200KB Under 500KB Under 1MB Closest to 50KB Closest to 100KB Closest to 200KB Closest to 500KB

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Fix a photo

Quick fixes for common photo problems, with nothing uploaded to a server.

Red Eye Remover

Automatically fixes flash red-eye across a batch of photos. Tap to correct anything we miss.

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Resize for a platform

Work out exact pixel dimensions for Instagram, YouTube, Stories, and more - then crop your own image to fit.

4:5 calculator

Instagram Portrait

16:9 calculator

Widescreen & YouTube

1:1 calculator

Square & Profile Pics

9:16 calculator

Stories & TikTok

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Make something new

Turn still photos into something you can share or download.

GIF from Photos

Upload a sequence, drag to reorder, add crossfade or boomerang, and download a looping GIF.

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Guides

Plain-language explainers for formats and upload problems.

HEIC vs JPG

Why iPhone photos won't upload everywhere, and what to do about it.

Need a format conversion instead?

Crest Convert also handles hundreds of file format pairs - HEIC to JPG, PDF to PNG, Word to PDF, and more.

Browse all converters