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Real-Time WebGL GPU Engine

Straighten Photo & Perspective Correction Studio

Correct converging vertical lines, fix crooked horizons, and adjust keystone perspective with real-time GPU-accelerated sliders. Completely free and private.

Drop an image, or click to browse

Supports PNG, JPEG, WebP, AVIF. Processed locally in your browser — nothing is uploaded.

Or try with a sample photo
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Straighten Photo & Perspective Correction Studio

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Pulls converging vertical lines parallel (e.g. buildings viewed from below)
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Corrects perspective from off-center, left or right shooting angles
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Levels crooked horizon lines and tilts
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Compensates for horizontal or vertical stretching caused by keystone fixes
Grid Color:
Looking for 4-Corner Pin?

For manual quad point warping and document boundary scanning, try our 4-corner perspective tool.

Perspective Corrector →

How Does It Work?

1

Select Photo

Upload or drop your photo, or pick a sample photo.

2

Adjust Keystone

Adjust the vertical and horizontal keystone sliders to align parallel lines.

3

Level Horizon

Use the rotate slider and alignment grid to level the horizon.

4

Export & Share

Download your straightened photo as PNG, JPG, or WebP.

Real-Time WebGL GPU Engine

Instant 60 FPS live preview with bilinear filtering even on high-resolution photos.

Interactive Alignment Grid

Rule-of-thirds, 6x6, and 12x12 precision grid overlays help you align vertical and horizontal lines.

100% Private & In-Browser

Your photo never leaves your computer. No accounts, no data logging, no waiting.

Multiple Export Formats

Download in lossless PNG, JPEG, WebP, or copy directly to clipboard.

Frequently Asked Questions

Simply upload your photo and use the Vertical Keystone slider to pull angled vertical lines back to parallel. Use the Rotate slider to level the horizon and the Aspect slider to compensate for any stretching.

No. The entire perspective transformation runs 100% locally in your web browser using WebGL GPU acceleration. Your images stay on your device unless you explicitly click 'Upload & Share'.

Straighten Photo uses intuitive single-axis sliders to adjust verticals, horizontals, and tilt symmetrically without having to manually drag four corner points. If you need arbitrary quad-pinning for complex angles, you can use our 4-Corner Perspective Transform tool.

You can export in lossless PNG, high-resolution JPEG (with quality control), or modern WebP format, or copy it directly to your clipboard.