A realistic PDF scan effect uses grayscale, 0.3°–2° of rotation, 10–20% noise, 0.1–0.3 px blur, normal contrast and a slightly warm page. Keep text readable: if you notice the effect before you read the words, it is too strong. You can apply and preview these settings for free in the PDF2Scan scan tool.
- Grayscale and a slight tilt do most of the work; noise and blur only add believability.
- Rotation above 3° and blur above 0.5 px are the two most common reasons a scan looks fake.
- Use stronger settings (Old) only for documents that should look aged or photocopied.
- Check the smallest text on the page (dates, totals, fine print) before exporting.
- 150 dpi suits most documents; 300 dpi is better for small print and signatures.
What a scanner really does to a page
A flatbed or office scanner captures paper with a moving light and sensor, then compresses the result. That process leaves fingerprints a digital PDF does not have:
- the page sits slightly crooked on the glass;
- the sensor adds fine grain, especially in light areas;
- edges of letters soften a little;
- blacks are not perfectly black and whites are not perfectly white;
- paper has a tone, sometimes warm or yellowed;
- the lid casts a faint shadow along the page edges.
A scan effect recreates those fingerprints. The art is in the proportions.
The six effects, one by one
1. Rotation (tilt)
The single most recognizable scan trait. Real pages are almost never perfectly straight, but they are not dramatically crooked either. 0.3°–2° reads as natural; above 3° it looks careless.
2. Grayscale
Most paperwork is scanned in grayscale to keep files small. Converting to grayscale instantly removes the “exported from Word” feel. Keep color only when it matters, such as a red stamp or a blue-ink signature (color mode is part of PDF2Scan PRO).
3. Noise (grain)
Sensor noise breaks up perfectly flat backgrounds. 10–20% is enough for modern scanners; 40–60% suggests an older device or a photocopy.
4. Blur (softness)
A touch of blur imitates the optics of a scanner. 0.1–0.3 px softens edges without hurting legibility. At 0.7 px and above, small numbers start to merge.
5. Contrast and brightness
Scanners usually push contrast a little so text looks like toner, and darken the page slightly. Keep contrast near 50–60% for clean documents and 70% or more for a photocopy look. Lowering brightness a few points makes the paper look less like a screen.
6. Paper tint
A slightly warm page signals real paper. Use 0–5% for modern documents and 15–25% for aged paperwork. Above 30% the page looks stained.
Bonus: scanner edge shadow
The soft dark band a scanner lid leaves along the borders. It is subtle but very convincing on full-page documents. Available in PDF2Scan PRO.
Recommended settings by document type
Start from these values in the scan tool and adjust to your document. Percentages match the PDF2Scan sliders.
| Document | Preset to start | Rotation | Noise | Blur | Contrast | Paper tint | Resolution |
|---|---|---|---|---|---|---|---|
| Contract or agreement | Office | 1–2° | 15–20% | 0.2 px | 50–55% | 0–5% | 150–200 dpi |
| Form or application | Office | 1–2° | 20% | 0.2 px | 55% | 0% | 150 dpi |
| Invoice or receipt | Subtle | 0.3–1° | 10–15% | 0.1 px | 55–60% | 0–5% | 200 dpi |
| ID or certificate copy | Subtle | 0.5–1° | 10% | 0.1 px | 55% | 0% | 300 dpi |
| Signed letter | Office | 1–2° | 20% | 0.2 px | 55% | 3–8% | 200–300 dpi |
| Old record or archive | Old | 2–4° | 45–55% | 0.5–0.7 px | 65–70% | 15–20% | 150 dpi |
| Photocopy look | Heavy | 1–3° | 60–80% | 0.6–1 px | 80–85% | 5–10% | 150 dpi |
Values above 150 dpi and color scans require PRO in PDF2Scan.
Five mistakes that make a scan look fake
- Heavy rotation on a clean page. A 7° tilt with crisp text is a contradiction; real crooked scans are usually also soft and grainy.
- Blur instead of noise. Blur alone looks like a low-quality export, not a scan. Add grain first.
- Leaving the page pure white. Real paper always has some tone or texture.
- Unreadable totals and dates. Zoom to 200% on the smallest numbers before exporting.
- Color on everything. Full-color “scans” of black-and-white paperwork are rare; use grayscale unless color carries meaning.
How to apply the effect in under a minute
- Open the PDF2Scan scan tool and drop your PDF, JPG or PNG.
- Pick the preset from the table above for your document type.
- Adjust the sliders and compare with the Split view.
- Choose PDF, JPG or PNG as the output format and download. 1 export per day is free, no signup.
Everything runs in your browser, so the document is never uploaded. For whole folders of documents, PRO adds batch processing of up to 10 files, one merged PDF and saved presets so every file gets exactly the same look.