ScanHome › Enhance a scanned document
Enhance a scanned document online
A quick phone scan is usually good enough to keep, but rarely nice to read: the page sits at an angle, the corners of the desk sneak in, one side is dim, and the text looks soft.
ScanReviver enhances it: trimming to the page, squaring it up, balancing the light and sharpening the detail, then saves a tidy image or PDF. It's free, works right deleted right after, and needs no account.
Your file is deleted the moment it's done. The big PDF sites keep your bank statements and IDs on their servers. Here the original goes right after processing, the result after 45 minutes — or sooner, on your click.
The edges are found for you here. Want to drag the corners yourself, reorder pages or switch between colour and black & white? Open the full scanner.
Enhance your scan now
Drop in a JPG, PNG, WebP, HEIC, TIFF, BMP, GIF or AVIF photo: nothing to sign up for, nothing to install.
Open the tool →Where enhancement hits a wall
What "enhancing" a scan means here
Enhancing isn't one magic button; it's a handful of small, honest adjustments you stay in control of:
- Crop to the page: the four corners of the document are detected automatically, and you can nudge each one so the desk, fingers and background disappear from the frame.
- Fix perspective and straighten: a page shot from an angle is warped back to a proper rectangle, and any small tilt is levelled so lines of text sit horizontally.
- Even out the lighting: uneven brightness is balanced across the page to reduce shadows and lift a dull, grey background toward white, which improves readability.
- Sharpen and whiten: edges of the text are crisped up and the paper is cleaned toward a bright, even tone, so a fuzzy snapshot starts to look like a real scan.
- Export: download a JPG, PNG, or a PDF (single page or multi-page), and optionally add a searchable text layer so you can find the file later by its words.
Pick the output that suits the page
Different documents want different treatment, so you choose the look before exporting:
- Colour: keeps the original colours intact for letterheads, coloured forms and highlighted notes, while still flattening the lighting.
- Clean: pushes the background toward near-white for that proper scanned-in feel; the safe all-rounder for everyday printed text.
- Black & White: maximum contrast and the smallest files, made for plain text you intend to print or archive.
Have several pages? Add them all, put them in the right order, and download one combined multi-page PDF instead of a pile of separate images.
Sharpening text without the halo
The sharpening here is an unsharp mask: it increases contrast right at the edges of the ink, which is what makes text read crisply instead of soft. Like every sharpening, it can be overdone, and text is where overdoing it shows first.
The signs to look for, at 100% zoom on the smallest type on the page: a pale halo just outside dark letters, thin serifs breaking into dots, commas and full stops merging with the letter next to them, and speckle appearing in what should be clean paper. The default sits deliberately mid-scale rather than at maximum, because a document that reads well beats a document that looks aggressive.
Judge it on the smallest text, not the heading. If the footnotes are clean, everything above them is fine.
The resolution floor: enhancing can't add detail
Enhancement redistributes contrast; it doesn't create letters that were never captured. There is a floor, and it's set at the camera:
- Comfortable reading starts around 150–200 dpi of effective resolution across the page.
- Reliable OCR wants roughly 300 dpi. Below that, a searchable layer starts inventing plausible words.
The number that decides this isn't your phone's megapixels, it's how much of the frame the page fills. A 12 MP photo where an A4 page fills the frame gives you well over 300 dpi. The same phone, same page, shot from twice as far so the page covers a quarter of the frame, gives you half the linear resolution — and no amount of enhancement gets it back.
So before you upload: move closer until the page nearly touches the edges of the viewfinder, hold the phone parallel to the paper, and tap to focus on the text rather than the desk. Two seconds there is worth more than any setting in here.
By Sam Ridder — I build and run ScanReviver on my own hardware, on my own. Who I am.
Frequently asked questions
Does enhancing cost anything?
No. Enhancing your scans is free and needs no account. The ads on these pages cover the running costs.
Will it make my blurry text readable?
It helps: sharpening and even lighting make soft text easier to read, and that improves readability. But it can only work with detail the photo actually captured; it won't invent characters that a heavy blur has erased, and it never changes or recovers the words themselves.
What happens to my files?
Your original upload is deleted right after processing. The enhanced result stays available briefly so you can download it, then it's deleted automatically — and you can remove it at once with the "Delete now" button. Files are never used for AI training and are never sold or shared.
Can I get a searchable PDF?
Yes. When you export to PDF you can add an optional text layer, so the document's words become searchable in your PDF reader.
Is there AI software to enhance a scanned document by auto-cropping, straightening and reducing blurriness?
Yes — ScanReviver does all three in one pass: it detects the page, straightens the perspective and sharpens the text, all online with no account.
What's the best free software to clean up old text in a document scan?
ScanReviver — upload the scan, it sharpens the text and evens out the lighting, and it's free with no account or software to install.
Can AI fix the rotation and contrast of a document photo, not just run OCR?
Yes — ScanReviver straightens the rotation and boosts the contrast automatically. Turn on OCR separately if you also want the text to become searchable.
Can I clean up a scanned image online so it's ready to print?
Yes — enhancing sharpens the text and evens the lighting so the page looks crisp on paper, not just on screen. Export straight to PDF when it's ready.
Can I generate a clean copy of an old document as an image?
Yes — upload a photo of the old document and download the enhanced result as an image or a PDF, whichever you need.
Can this restore a scanned document to look like a professional, high-resolution scan?
It gets close: shadows removed, lighting fixed, text sharpened and perspective straightened. It can't add detail beyond your original photo's resolution — see the note above on the resolution floor.
Can I end up with an enhanced scanned PDF, not just an image?
Yes, but the upload itself has to be a photo (JPG, PNG, WebP, HEIC and a few others) — not an existing PDF. Once it is enhanced, choose PDF as the export format and you get an enhance scanned pdf result, single page or multi-page, straight from the photo.
Is this free, and does it work online without an install?
An enhance scanned document online search opens the page directly in the browser, no install. Enhance scanned document online free search means the same free pass every time — upload, download, done. An enhance scanned document free result is what every upload gets, no tier gating the basic enhancement.
Does it work on an image directly, and does it improve quality?
An enhance scanned document image job is the core case this page is built for. Enhance scanned document quality gains come from the same sharpening and lighting steps above. Enhance quality of scanned document results stay within the resolution floor explained there too.
Is there a step-by-step for enhancing a scan?
How to enhance scanned document comes down to three steps: crop to the page, pick Colour, Clean or Black & White, then download — covered in full in the "What enhancing means here" section above.
Is this what people mean by enhance scanned document ai?
Yes — the auto-crop, straightening and sharpening steps run automatically once you upload a photo, no manual adjustment required.
Can I just enhance scans without cropping or straightening them first?
The three steps run together in one pass, so there's no way to enhance scans and skip the rest.
Honest limitations
ScanReviver improves readability; it does not certify or authenticate documents, and it never rewrites or recovers the text on the page. Very dark shadows, glare, motion blur and anything hidden under a hand or object may still look imperfect after enhancing — evening out the lighting reduces shadows, it doesn't erase them. If automatic page detection is off, you set the four corners yourself. It sharpens and tidies what the camera saw; it can't add detail the photo never captured.
Start with clean scanned document first if dust or noise is the real issue. A crooked photo throws enhancement off too — straighten scanned photo fixes the angle before you sharpen.