Pick any colour and recolour every piece of body text in your PDF in one click. Perfect for accessibility (high-contrast docs), branding (corporate colour palettes), classroom highlights and custom design tweaks — all in your browser.
Click to select a file or drag and drop
PDF file
Your files never leave your device.
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Drag a PDF onto the upload zone or pick it from your device. The file is processed locally in your browser; nothing is uploaded.
Open the colour picker, pick any RGB / hex colour (high-contrast black, brand blue, classroom red, etc.) and preview the result page by page before applying.
Click apply to rewrite every text-drawing instruction in the PDF with the chosen colour, then download a brand-new PDF. The source file stays untouched on your device.
Change the background color of your PDF.
Fine-tune brightness, contrast, saturation and more in your PDF.
Annotate, highlight, redact, comment, add shapes/images, search, and view PDFs.
Stamp text or an image over your PDF pages.
Add text to the top and bottom of pages.
ZentoPDF rewrites the colour of every text-painting operator across every page, so all body text (paragraphs, headings, footnotes, captions) becomes the chosen colour. Images and vector graphics are left untouched.
The standard tool recolours all text. For finer control — only a page range, or only a specific phrase — use our Edit PDF tool, which lets you select a region and apply a colour change only there.
Yes — it is one of the easiest ways to improve contrast for users with low vision: turn light-grey body text into pure black, or apply your brand’s high-contrast palette. The result is a real PDF (not a screen filter) so it works in every viewer.
No. The whole recolouring runs locally in your browser using pdf-lib. Your original PDF and the recoloured output never leave your device.
Yes — 100% free, no signup, no watermark, no daily quota.