PRECISION IMAGE TOOLS

Perspective Correction Studio

Flatten tilted pages, straighten posters, and restore photos in a few precise moves.

01 · Source image

Processed privately in your browser. Source images never leave your device.

No image loaded yet

02 · Select four corners

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Drag the four blue handles to the corners of the area you want to straighten. Use arrow keys for fine adjustments.

03 · Straighten & crop

Output ratio

Rotate result

Trim corrected edges (%)

LeftTopRightBottom

Document and photo enhancementsAppearanceBrightness 0Contrast 0

Black & white uses a fixed threshold. Preview text carefully before exporting.

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Bring your image into perspective.

Add a photograph, document, printed poster or scan to begin. No upload required.

Ready · Local processing only

LIVE OUTPUT

Preview & export

Check the corrected result before saving.

Perspective corrected

Your corrected image appears here.

Export settings

Format Resolution Quality 92%Empty edges

JPEG/PDF cannot preserve transparency. PDF embeds a JPEG on one fitted A4 page; it is not a searchable or vector PDF.

Output dimensions appear here.

Private by design

PixelOkay processes images locally. No account, API key, cloud conversion or remote image upload.

How perspective correction works

Choose four corners in clockwise order. The studio computes a projective transform to map that quadrilateral into a rectangular image. Results are interpolated; they cannot recover details missing from the original photograph.

Free online perspective correction for photographs and documents

Straighten tilted papers, whiteboards, signs, frames, posters, receipts and photographs without uploading files. Pick the four corners of the area to rectify, choose your aspect ratio, rotate or crop the result and save a PNG, JPEG or WebP image. The worker-based process runs locally in your browser and uses bilinear image sampling for smoother edges.

Helpful tips

Choose precise corners along the same physical flat surface. A strongly bent page, curved book or severe lens distortion cannot be fully repaired by a single four-point perspective transform. Very large images are limited to protect browser memory.

Using Perspective Correction Studio

Open a supported image and place the four source corners around a flat surface. Use zoom, pan and the magnifier to refine corners, select output geometry and adjust tone. Export the corrected image or fitted PDF and keep an editable project backup when within its embedding limit.

The geometry assumes a flat surface; it does not remove lens distortion, dewarp curved books, perform OCR or recover missing detail. Input is bounded to 30 MiB/24 MP and output to 12 MP. PDF is a white-backed raster fitted to A4, not searchable, vector or scale-preserving. Images over the 22 MB embedding limit cannot be saved inside portable JSON projects. Browser recovery is best effort.

Choosing outputs and planning a Perspective Correction Studio workflow

Rectify a supported photo of a flat surface by placing four source corners, adjusting output geometry and tone, then exporting an image or fitted PDF.

The corrected image is a raster result. PDF output is a single white-backed raster fitted to A4; JSON is an editable project backup when the source image fits its embedding limit.

Example workflow

Open a supported PNG, JPEG or WebP and place the four corners around a flat page or sign.
Use zoom, pan and the magnifier to refine each corner, then choose output geometry and tone.
Inspect the corrected raster and, if needed, export the fitted PDF and a separate editable project.

Authored example: Use a fictional photograph of a flat paper notice taken at an angle. Identify its four corners and review how the corrected rectangle differs from the original crop.

Scope: Four-point geometry assumes a flat surface. It does not correct lens distortion, dewarp curved pages, perform OCR or recreate missing detail. PDF is not searchable, vector or scale-preserving.