Edit image colours and watermark

About this tool

Adjust brightness, contrast and saturation, apply grayscale or inversion, and add a text watermark to an actual PNG export.

Supported input

PNG, JPG, WebP, TIFF, BMP

Output format

PNG

Batch size

Up to 5 files; format and combined limits below still apply.

How it works

1. Add Supported PNG / JPG / WebP / TIFF / BMP files in Input. Review each thumbnail and its validation status.
2. Choose colour settings and optional watermark text. Drag the before/after divider to inspect the live reduced-size preview. Create PNG exports full resolution; reset adjustments to start again.
3. Create the selected files. Compare original and result, then download an individual file or ZIP. Changing settings marks older results out of date.

Supported files and limits

Up to 5 files, 10 MiB each and 25 MiB combined. Each image must fit within 8192 pixels per side and 20 million pixels; a batch is limited to 40 million input pixels. Output is limited to 20 MiB per file and 50 MiB combined. One isolated image job runs at a time, with a 30-second timeout and cancellation.

A practical example

Adjust brightness, contrast or saturation on a supported image and compare the live before-and-after view. A text watermark can identify a sharing copy before PNG export.

Troubleshooting this tool

The live view is a reduced preview, while Create exports full resolution. A watermark or whole-image blur is not secure redaction; retain the original and inspect the full download.

PNG input must be non-interlaced, 8-bit RGB or RGBA. Animated PNG, EXIF, ICC profiles and compressed/international text metadata are rejected before decoding.

JPG input supports 8-bit baseline/progressive RGB or grayscale. EXIF/ICC/multi-picture metadata and CMYK are currently rejected, so orientation and colour profiles are not silently discarded. Export an unprofiled copy from your image editor if needed.

WebP input must contain one static image. Animation, ICC profiles, EXIF, XMP and unsupported container chunks are rejected. Both lossy and lossless input bitstreams are decoded by the browser; this tool does not promise lossless WebP output.

TIFF input supports one uncompressed classic TIFF page, top-left orientation, chunky unsigned 8-bit grayscale, RGB or RGB with unassociated alpha. BigTIFF, compressed/tiled/multipage files, palettes, CMYK, profiles, EXIF and unknown tags are rejected. Resolution metadata is not retained.

BMP input requires uncompressed 24-bit RGB with a standard 40-byte DIB header, no palette/profile and exact padded row bytes. Both top-down and bottom-up rows are supported. Other BMP variants are rejected.

Check the actual export

Basic pixel adjustments in sRGB, with alpha preserved. Watermarks use browser sans-serif text with a black outline. This is not an AI enhancer, layer editor or missing-detail reconstruction tool. Inspect downloaded dimensions, transparency and fine edges before replacing an original. Browser encoders differ; a quality setting is not a universal fidelity score, and file size may increase.

Files stay in your browser

No file bytes are uploaded. Ordinary work stays in memory. Choosing a “Continue” action saves that result in this browser for up to 30 minutes, so another compatible working tool can use the actual output. Saved workflows are limited to 50 MiB and 20 files; clear them in Output. Expired entries are removed on later tool visits. Clearing references is not a secure-erasure promise.

If a file fails

Check its actual format and the restrictions above. Renaming a file does not convert it. A failed file does not erase successful batch results. If processing times out, cancel and try fewer or smaller files. A current browser with worker canvas support is required.

Before you use the download

• Compare the full-resolution PNG with the source; the live preview is a smaller draft.
• Check the strength of adjustments and any watermark placement. Blur and watermarking are not secure-redaction methods.

Tools that accept this output

These links use this tool's default output format, subject to each next tool's supported variants and limits. If you change the export format, use Continue in Output to see compatible actions for the actual result. Opening a link below starts another tool without transferring a file.

• Convert PNG to JPG — Convert supported PNG images to JPG with adjustable quality and a white or custom background.
• Resize a PNG image — Resize supported PNG images with real previews, aspect-ratio controls and local downloads.
• Convert PNG to WebP — Create a static WebP from a supported PNG, with quality controls and transparency.

Need help with this operation? Contact Pro Edit Tools Support with a non-sensitive description of the problem.