One photo, one screen
Cropping, filters, drawing, tone curves and resizing live in a single editor, so finishing one picture does not mean bouncing between four apps.
Tool
Photo Editor
Crop, filter, draw and pull tone curves on a single photo — with a before-and-after check before you commit to saving.
Why OneBox for photo editing
Check before you commit
Compare your edit against the original. It is the fastest way to tell whether you have improved the photo or just made it louder.
You decide what gets saved
Set the output dimensions, pick the format and dial the quality yourself, instead of accepting whatever the exporter decided for you.
How it works
- 1
Open a photo
Pick any image from your gallery and it loads straight into the editor.
- 2
Edit it
Crop or straighten first, then apply filters, draw, or pull the tone curves. Resize and choose an output format when you are close.
- 3
Check and save
Compare against the original, adjust quality if the file is larger than you want, then save as a new file.
Inside the tool
Real screens from this module. The interface is shown in Chinese here — OneBox ships in twelve languages, English included.
AI agent
Or just say it
Tell the built-in agent what you want in plain English. It picks the right tool, runs it, and reports back — you never leave the chat.
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Open this photo in the editor›
Open the editor so I can crop this screenshotCommon questions
Does it need an internet connection?
No. Cropping, filters, drawing, tone curves, resizing and format conversion all run on your device. Your photos are not uploaded.
Can I see the original while editing?
Yes. The before-and-after comparison exists precisely so you can check whether an edit helped.
What can I change about the output?
Dimensions, format and quality. Saving always writes a new file, so the original is left alone.
Can the assistant edit photos for me?
Not yet. The agent can open the editor for you, but the edits themselves are yours to make — there is no tool that applies filters or curves on your behalf.
Get OneBox free
90+ tools, free, no ads. All processing happens on your device. Open source under Apache-2.0.