Adjust PDF Colors
Fine-tune PDF brightness, contrast, saturation, hue, temperature, gamma and sepia with a live preview.
Upload PDF File
About This Tool
Adjust Colors gives you photo-editor control over an entire PDF. Eight independent adjustments — brightness, contrast, saturation, hue shift, temperature, tint, gamma and sepia — are applied to every page at once.
A live preview of the first page updates as you move each slider, so you can dial in the result before committing to a full re-render. Page dimensions are preserved exactly, so the output drops into the same workflow as the original.
Everything runs in your browser; the document never leaves your device.
How to Use
Upload Your PDF
Drag and drop your PDF or click to select it. The first page loads as a live preview.
Adjust the Sliders
Move brightness, contrast, saturation, hue, temperature, tint, gamma and sepia until the preview looks right.
Apply and Download
Click Apply to render every page with your settings, then download the result.
Use Cases
Rescue Faded Scans
Lift contrast and gamma to make washed-out scanned documents legible again.
Tone Down Bright Documents
Reduce brightness and add warmth for comfortable extended reading.
Match a House Style
Apply a consistent temperature and tint across a document set before publishing.
Frequently Asked Questions
Does this change the page size?
No. Pages are re-rendered at high resolution but written back at their original dimensions.
Why does the text look like an image afterwards?
Colour adjustment works on rendered pixels, so pages become images. Use Extract Text first if you need the text layer.
What does gamma do?
Gamma brightens or darkens midtones without clipping blacks and whites, which is usually gentler than a brightness change.