How to Make a Blurry Screenshot or Text Image Readable Again
Why screenshots and photos of text go soft, the settings that sharpen them best, and when it is better to retake the image instead.
By the ClearPix team · · 3 min read
Screenshots and images of text are some of the hardest pictures to enlarge well. A photo of a landscape can be a little soft and still look fine, but text is either readable or it is not. This guide explains why text images go blurry, how to get the most out of an AI upscaler for them, and the quick fixes that often work better than any tool.
Why screenshots and text images go blurry
- They were shrunk. Chat apps and social networks often resize images, and a full-page screenshot reduced to fit a preview loses most of its fine detail.
- They were saved as JPG. JPG compression produces fuzzy halos around high-contrast edges, and text is nothing but high-contrast edges. See JPEG compression artefacts explained.
- They were taken on a low-resolution screen. Text rendered at a small size on an older monitor is only a few pixels tall to begin with.
- They are photos of a screen or paper, which adds focus blur, glare and moiré patterns on top.
First, try to get a better source
Enlarging should be the last resort, not the first, because any tool can only work with the pixels it is given.
- If you can still open the original page or document, retake the screenshot with the browser or document zoomed to 150–200%. The text is drawn larger and sharper, which beats any upscaling.
- Ask the sender to share the original file, or to send the screenshot as a document rather than as a photo, so the chat app does not compress it.
- If the text came from a PDF or web page, copy the text itself instead of using an image of it.
Upscaling text images: the best settings
When the image is all you have, the AI image upscaler can make a real difference, especially for screenshots that were shrunk or compressed. Text needs different settings from photos:
| Setting | For screenshots and text | Why |
|---|---|---|
| Factor | 2x (try 4x only for very small text) | Small steps keep letter shapes accurate |
| Denoise | 0–10% for clean PNGs, 20–30% for JPGs | Too much smoothing rounds off thin strokes |
| Colour boost | 0% | Adds nothing to text and can tint backgrounds |
Compare the result with the before/after slider, paying attention to letters that are easy to confuse: e and c, rn and m, 1, l and I, 0 and O. If the upscaled text reads differently from the original, trust the original.
Saving the result
Download the upscaled image as PNG and keep it as PNG. Converting text images to JPG brings back the halos you just removed. If a platform forces JPG, use the PNG to JPG converter at 92% quality or more.
For screenshots that will be shared often, such as in documentation, a help article or a presentation, consider WebP at high quality. It is usually much smaller than PNG and still sharp.
Photos of documents and screens
Photos of paper or monitors have extra problems that upscaling does not solve on its own:
- Glare: change the angle so the light source is not reflected.
- Moiré (rainbow wave patterns) when photographing screens: step back and zoom in slightly, or tilt the phone a little.
- Perspective: hold the phone parallel to the page, or use a document scanner app to straighten it.
- Focus: tap on the text before taking the photo and hold still.
Once you have a reasonably sharp photo, a 2x upscale with moderate denoise can make it clearer for reading and printing.
Summary
- Get a better source if you can: re-screenshot at a higher zoom or ask for the original.
- Upscale 2x with low denoise and no colour boost.
- Check easily confused letters and numbers against the original.
- Keep text images as PNG or high-quality WebP, never low-quality JPG.