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Reduce file size without losing quality.
Old scans, thermal paper receipts, and yellowed documents often have faded text and washed‑out images. Our AI‑powered restoration tool boosts contrast, brightens dark areas, whitens background, and revives faded colors – without losing detail. Ideal for historical records, faded contracts, vintage photos, and any document that has lost its original vibrancy. No software to install, and your files are automatically deleted after processing.
Did you know? Thermal paper receipts fade completely in 2‑5 years. Our AI can reconstruct lost characters and numbers, turning blank receipts back into readable documents.
Understanding the cause helps you choose the right restoration approach.
Receipts and labels printed on thermal paper fade to blank within a few years due to heat and light exposure. Our AI can recover hidden characters.
Low brightness or contrast during scanning produces washed‑out text. This is easily correctable with contrast enhancement.
Newspapers, books, and documents become yellow over time, reducing contrast. Background whitening restores a clean white page.
Ink can degrade or be erased by water damage. Our edge‑aware recovery strengthens faint strokes.
Bonus cause – back‑to‑back scanning: Text from the reverse side often bleeds through, causing a grey haze. Our bleed‑through removal isolates the front side.
Upload your faded PDF – Our system analyses contrast, brightness, and page background.
Select restoration strength – Mild (fix slightly low contrast), Medium (recommended for most), or Strong (for severely faded documents).
Apply AI restoration – The tool whitens background, adjusts levels, and enhances edges. A real‑time preview shows the transformation.
Download the revived PDF – The document will look crisp and readable, ready for printing, sharing, or OCR.
Pro Tip: For extremely faded thermal paper receipts, use our "Thermal Recovery" mode. It not only boosts contrast but also infers missing character strokes using AI trained on receipt fonts.
Our restoration pipeline applies three advanced operations:
These operations are applied only to areas that need them; already clear parts are left unchanged.
Thermal paper documents are notorious for fading to invisibility. Our dedicated recovery mode uses a neural network trained on thousands of faded receipt images. It identifies faint residues of characters and reconstructs them. For best results, scan the thermal paper at 600 DPI before uploading. Even if the receipt looks blank, we can often recover the original numbers and text.
Real‑world example: A business needed to recover 5‑year‑old thermal paper invoices for an audit – most were completely blank. After scanning at 600 DPI and using our thermal recovery, over 90% of the faded text became readable, saving thousands of dollars in lost documentation.
Contrast and whitening alone add negligible file size. Only if you also upscale DPI will size increase. Our Balanced profile applies strong restoration without upscaling, keeping file size nearly identical to the original. For archival masters, you can combine restoration with upscaling to 300 DPI.
Tip: If your faded PDF is already high resolution (300 DPI), use restoration only – no upscaling. The quality gain will be dramatic, and file size will barely change.
⚡ Need to adjust or standardise DPI without changing pixels?
Use our dedicated PDF DPI Changer to view, adjust, or unify the DPI metadata of embedded images. Perfect for pre‑press compliance, print workflow validation, and preparing files for commercial printing without altering visual quality.
Faded text results from poor scan settings (e.g., low brightness or wrong contrast), old or yellowed paper, faded ink (thermal paper receipts, typewriter ribbons), or improper saving after OCR. Our restoration boosts contrast, brightens dark areas, and normalizes the page background without losing detail.
Yes. Yellowed paper scans are common with old books or documents. Our background whitening algorithm flattens the page to pure white, while adaptive contrast adjustment darkens faded text. The result looks like a clean, modern scan.
Contrast and brightness adjustments alone add little file size (under 5%). If you also upscale DPI (e.g., from 150 to 300), size may increase. Our smart compression keeps the final file size reasonable – typically 2‑5 MB for a 10-page document.
Our enhancement distinguishes between text and image areas. For faded photos, we apply tone curve adjustment and contrast stretch without over‑saturating. You can also manually adjust exposure and shadow recovery using the advanced controls.
Yes, thermal paper fades over time, becoming unreadable. Our special "thermal recovery" mode uses AI to infer missing strokes and boost contrast. For best results, scan the receipt at 600 DPI before uploading, then let our tool restore it.
No. Restoration improves visual quality but does not add a text layer. After you revive the document, use our OCR tool to convert the enhanced images into selectable, searchable text. The order matters: restore first, then OCR.
Yes. All uploads are encrypted with TLS 1.3 and automatically deleted within 24 hours. We never use your documents for training or share them. An offline desktop version is available for organisations with strict security policies.
Yes, the tool is fully responsive and works on iOS and Android. Upload from cloud storage or camera roll. Processing runs in the cloud, so your device does not need high processing power.
Upload your faded PDF and let AI restore it to pristine clarity in seconds.
Enhancing a PDF improves visual clarity by adjusting resolution, sharpening text edges, and increasing contrast between foreground and background elements. This process is particularly useful for scanned documents, blurry text, or faded paperwork.
Several factors may reduce the readability of a PDF document. Low-resolution scanning, aggressive compression, improper export settings, and camera-captured documents can all introduce blur or reduce contrast.
Modern PDF enhancement tools apply multiple processing techniques to improve readability.
PDF enhancement algorithms work by analyzing pixel density and grayscale distribution. Contrast adjustment increases the difference between text and background while sharpening filters reconstruct blurred edges. When combined with OCR preparation, enhancement dramatically improves machine readability.
Explore the full collection of tools in the PDF Enhancement Guide.