OneImage
OneImage
Crop smarter, export faster

Precision cropping for every platform

Drop in a photo and instantly frame covers, thumbnails, and print-ready assets. Aspect presets, custom ratios, and pixel inputs keep every hero shot perfectly aligned.

Export

Estimated size: -
40%90%100%
Export size

Export follows the crop size.

💡 提示:按 ⌘/Ctrl+E 快速导出

💡 Output size: · Adjust the export dimensions above to match your needs.

Professional controls

Advanced features for precision work

Unlock professional-grade tools for pixel-perfect composition, efficient workflows, and complete control over your cropping pipeline.

40+ Preset Library

Ship faster with battle-tested aspect ratios for every major platform and print format.

  • Instagram, YouTube, TikTok, Twitter, Facebook ready
  • Shopify, Amazon, Etsy product card dimensions
  • A4, Letter, and custom print formats with DPI
  • Save unlimited custom presets with format settings

Lanczos Resampling

Export sharp, artifact-free images at any resolution with advanced resampling algorithms.

  • High-quality Lanczos3 interpolation by default
  • GPU-accelerated processing for smooth performance
  • Off-thread export prevents UI blocking
  • Maintains edge sharpness even at extreme scales

30-Step History

Never lose your work with comprehensive undo/redo and automatic session recovery.

  • Unlimited undo/redo up to 30 operations
  • Auto-save to IndexedDB every action
  • Resume exactly where you left off after closing
  • Compare different compositions side by side

Precision Cropping

Control every pixel with numeric inputs, keyboard shortcuts, and grid alignment.

  • Exact X/Y positioning and pixel-perfect dimensions
  • Arrow keys for 1px nudge, Shift for 10px jumps
  • Rule of thirds and center line guides
  • Snap to edges and auto-center alignment

Grid & Guides

Compose like a pro with dynamic overlays and adjustable opacity controls.

  • Rule of thirds for classic composition balance
  • Center crosshairs for logo and text alignment
  • Adjustable grid opacity for different backgrounds
  • Mask strength control to preview bleed areas

Multi-Format Export

Output PNG, JPEG, or WebP with fine-grained quality and metadata control.

  • PNG for lossless UI assets and transparency
  • JPEG with adjustable quality for photography
  • WebP for modern web with smaller file sizes
  • Optional EXIF preservation or stripping

All processing happens locally in your browser

Zero uploads, instant results, complete privacy. Your images never touch our servers.

Three steps to publish-ready crops

Start with a single drop, lock the composition, then export pixel-perfect assets. The guide below highlights the controls that keep social covers, product cards, and print artwork consistent.

Frame

Choose the right ratio before you touch the crop. The canvas instantly resizes to fit.

  • Drag handles or pinch to zoom until the main subject fills the frame.
  • Pick from Instagram, YouTube, TikTok, Shopify, or your saved presets.
  • Need a custom size? Enter pixel values for width and height and lock the ratio.

Refine

Dial in composition with guides, snapping, and precise offsets.

  • Toggle Rule of thirds or Center guides to align horizon lines and logos.
  • Use arrow keys for single-pixel nudges — hold Shift for faster 10px jumps.
  • Adjust mask strength to see the bleed while keeping focus on the crop.

Export

Deliver ready-to-ship files with metadata and background options tailored to each channel.

  • Switch between PNG, JPG, and WebP while previewing estimated file size instantly.
  • Fill the background with brand colors or keep it transparent for layered design work.
  • Decide whether to retain EXIF data before handing assets off to clients or teammates.

Preset workflow

  • Save custom ratios along with preferred format, quality, and resolution for recurring campaigns.
  • Build print presets with fixed DPI so exported files stay razor sharp at large scale.
  • Presets live locally in your browser and automatically reload the next time you open the tool.

Precision tooling

  • The Position panel exposes exact X/Y offsets and crop dimensions for QA reviews.
  • Canvas controls adjust snapping, guide overlays, and mask strength in real time.
  • Undo and redo preserve up to 30 actions, perfect for trying multiple compositions.

Export best practices

  • PNG keeps UI assets lossless, JPG balances quality for photography, and WebP is ideal for the web.
  • Set target width and height before exporting to avoid resizing downstream.
  • Exports inherit the original filename with a -cropped suffix so files stay organized.

Built for creators and operators

Non-destructive history

Undo up to 30 steps and automatically restore your last session.

Performance tuned

60 FPS interactions with GPU-accelerated rendering and off-thread exports.

Touch friendly

Pinch to zoom and drag the canvas with smooth inertial movement.

Preset library

Ship with Instagram, YouTube, TikTok, Shopify, and A4 print-ready options.

Common questions

Frequently asked questions

Everything you need to know about using the crop tool effectively and troubleshooting common scenarios.

01

Does the cropper run entirely locally?

Privacy

Yes, 100% client-side. All processing happens in your browser using Web Workers and Canvas API. Images never leave your device, ensuring complete privacy and instant performance.

02

Can I preserve EXIF metadata when exporting?

Export

Absolutely. Enable the 'Keep metadata' toggle before export to embed original EXIF data (camera settings, GPS, timestamps) into JPEG and WebP files. PNG doesn't support EXIF by spec.

03

What's the maximum supported image size?

Performance

The tool handles up to 50 megapixels using a dynamic resolution pyramid for smooth preview. Export always uses original full-resolution pixels regardless of preview optimizations.

04

How do I reset to the original uncropped image?

Workflow

Click the 'Reset' button in the canvas controls to instantly return to the initial full-size crop. Alternatively, use undo (⌘/Ctrl+Z) to step back through your editing history.

05

Can I export at a different resolution than the crop?

Export

Yes! In the Size controls panel, choose 'Custom export size' and enter your target dimensions. The tool will resample using high-quality Lanczos interpolation while preserving your composition.

06

Will my work be saved if I close the browser?

Workflow

Your current image, crop settings, presets, and history are auto-saved to IndexedDB. Reopen the tool and it automatically restores your previous session exactly as you left it.

07

How do I create a custom aspect ratio preset?

Presets

Set your desired width:height ratio, choose format/quality/DPI, then click 'Save preset'. Name it and it'll appear in the presets panel for instant reuse across sessions.

08

Why do my exports look slightly different from the preview?

Quality

The preview uses GPU-accelerated scaling for smooth 60fps interaction. Exports always use the original pixels with Lanczos resampling for maximum quality. Color profiles are converted to sRGB for consistency.

09

Can I use keyboard shortcuts to speed up my workflow?

Workflow

Yes! Press ⌘/Ctrl+O to import, ⌘/Ctrl+E to export, ⌘/Ctrl+Z to undo, and arrow keys to nudge the crop by 1px (hold Shift for 10px). See the shortcuts panel for the full list.

10

Does the tool work offline after the first load?

Performance

Yes! The crop tool is a Progressive Web App (PWA) that caches all assets on first visit. Once loaded, it works completely offline with no internet connection required.

Still have questions?

Check our detailed documentation or reach out via GitHub issues for technical support and feature requests.