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UFOZoo

Image Editor Online: Watermark, Filters & Color Adjust

Image editor online: add watermarks, apply filters, adjust brightness and contrast, and export to JPG, PNG, or WebP instantly.

Updated 2026-08-16

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Features

  • Add custom text watermark with adjustable position, font size, opacity, and color
  • Apply photo filters: grayscale (black & white), sepia (vintage tone), and blur
  • Adjust brightness (0–200%) and contrast (0–200%) for fine-tuning
  • Real-time preview: see all effects applied instantly
  • Supports JPG, PNG, and WebP output formats
  • Original image info display: dimensions, file size, and format
  • Save the result as JPG, PNG, or WebP
  • Adjustable JPEG/WebP quality for output
  • Drag-and-drop files or click to browse
  • No file size limits on input images

How to Use

  1. 1Open an image by clicking the drop area or dragging and dropping a file.
  2. 2Apply filters: toggle grayscale or sepia, adjust brightness and contrast sliders to fine-tune the look.
  3. 3Add a watermark: enter text, choose position (top-left, center, etc.), and adjust size, opacity, and color.
  4. 4Apply blur effect with adjustable intensity for background softening or privacy protection.
  5. 5Preview the result in real time on the right panel; all adjustments update instantly.
  6. 6Select output format and quality, then click Save to save the edited image.
  7. 7How to add a transparent watermark to protect your photos: open your image, enter your watermark text in the watermark section, set opacity to 30-50% for a subtle but visible mark, choose bottom-right position, and select a contrasting color. The watermark is permanent once saved.
  8. 8How to create a vintage photo effect: open a color photo, enable the Sepia filter for warm vintage tones, increase contrast by 20-30% to add depth, and slightly reduce brightness by 5-10% for an aged look. Preview the result in real time and save as JPEG.

Frequently Asked Questions

Can I combine multiple filters?

Yes. You can apply grayscale, sepia, brightness, contrast, and blur simultaneously. They are applied in sequence for a combined effect. For example, applying sepia with +20% contrast creates a vintage photo look. All filters update in real-time preview.

How does the watermark work?

The watermark is rendered as text overlaid on your image. You can customize the text content, position (top-left, top-right, center, bottom-left, bottom-right), font size, opacity (transparency), and color. The watermark is applied permanently to the output image.

Can I remove a filter after applying it?

Yes. All filters and watermark settings are applied in real-time preview. You can toggle any filter on or off, or adjust sliders, and the preview updates instantly. Only when you click Save is the final image saved with all active effects.

What are the output format options?

You can save as JPEG (best for photos, smaller file size), PNG (preserves transparency, larger file size), or WebP (modern format, best compression). JPEG fills transparent areas with white. Choose based on your use case; WebP is recommended for web use.

Can I adjust the blur intensity?

Yes. The blur effect has an adjustable intensity slider. Higher values produce stronger blur. This is useful for softening backgrounds, creating depth-of-field effects, or blurring sensitive information for privacy.

Will the watermark affect image quality?

The watermark is rendered directly onto the pixel data and does not reduce image quality. However, the final quality depends on your chosen output format and quality setting; JPEG at quality 0.6 or lower may show visible artifacts around the watermark text.

Are there any file size limits?

Since all processing happens in your browser, the practical limit depends on your device's available memory. Most images under 50MB work fine. Very large images (100MB+) may cause performance issues on lower-end devices.

Can I add text to an image?

Yes. Use the watermark feature: type any text, position it anywhere on the image, and adjust size, opacity, and color. It works as a caption, label, or logo text. There is no font-family picker or curved text here; for those, use a dedicated text-on-image tool.

Can I edit photos on a Mac without installing anything?

Yes, this tool runs in any browser on macOS (Safari, Chrome, or Firefox). For more capability, macOS ships with Preview and the Photos app for basic edits, and free apps like GIMP or paid ones like Pixelmator Pro handle advanced work. None of that is needed for this editor.

Can I blur faces or sensitive information in a photo?

Yes. Use the blur effect with adjustable intensity to obscure faces, license plates, or sensitive data. Increase the blur strength to make the area unrecognizable. Note that the blur applies to the entire image; there is no selective area blur in this version.

Why can't I undo my edits after saving?

There is no layer support or undo history in this editor. All edits are applied non-destructively in the preview, but once you click Save the effects are permanently baked into the saved image. Keep your original image as a backup before editing; it is the only way to get a previous version back.

Why is there no crop or rotate feature?

This tool focuses on filters, watermarking, and light adjustments; cropping and rotation are separate operations with their own controls, so they live in the dedicated image cropper and image rotator tools on this site. Open the image there first if you need to crop or turn it, then edit here.

Why does the saved image look different from the preview?

Two common causes: your monitor may be using a wide-gamut profile (the preview is converted to the sRGB color space the saved file uses, which can shift very saturated colors), and JPEG compression at low quality adds visible artifacts. Compare by saving the same edit as PNG; if PNG matches the preview exactly, the difference is JPEG compression, not a bug.

Why can't this image editor online open my PSD or RAW file?

Browsers can only decode web formats (JPG, PNG, WebP, GIF, and a few others); PSD and camera RAW files need desktop software or a conversion first. Convert the file to PNG or JPG with the Image Converter tool, then edit it here. Note that PSD layers and RAW adjustments cannot carry over; conversion flattens everything into pixels.

Why doesn't this image editor offer AI features like background removal?

This is a lightweight browser editor focused on filters, watermarks, brightness/contrast, and blur. AI features (background removal, upscaling, object erase) need heavy models that cannot run fully offline in a small page. Use dedicated AI photo tools or desktop apps for those tasks. Everything here runs in your browser, which is why AI features are out of scope for this editor.