Photo Editor — Crop, Filter, Adjust Brightness & Contrast
Browser photo editor: crop, rotate, filter, adjust brightness / contrast / saturation. Free, no upload.
About Photo Editor
A photo editor performs the common image-editing tasks — cropping, rotating, applying filters, adjusting brightness / contrast / saturation, sharpening — that constitute most everyday image work, replacing the heavyweight desktop apps (Photoshop, GIMP) for simple edits. The ZTools Photo Editor runs entirely in the browser using HTML5 Canvas, supports JPG / PNG / WebP inputs, real-time preview of adjustments, undo / redo, and exports the final image as JPG (lossy, smaller) or PNG (lossless, larger) with no server upload.
Use cases
- Quick crop for social media. Phone photo isn't the right aspect ratio for Instagram / Twitter. Crop to 1:1 / 4:5 / 16:9 in seconds rather than opening Photoshop.
- Brightness fix on dark photo. Underexposed shot needs +30 brightness, +10 contrast. Browser editor handles in 30 seconds.
- Quick filter for blog hero. Stock photo benefits from a unified colour grade. Apply a "warm" or "muted" filter for a coherent visual style.
- Privacy-first editing. Sensitive image (medical, personal, ID) — browser-only editing means no server ever sees the file. Important when working with privacy-sensitive imagery.
How it works
- Upload photo. Drag-drop or pick. JPG / PNG / WebP supported. Max practical size ~30MB before browser slowdowns.
- Crop / rotate. Free crop, aspect-ratio-locked crop (1:1, 4:5, 16:9, 3:2), 90° rotation, free rotation with slider.
- Apply adjustments. Brightness, contrast, saturation, hue, sharpen, vignette. Real-time preview; sliders normalised to ±100.
- Apply filters (optional). Pre-set looks: warm, cool, B&W, sepia, vintage, faded. Combinations of underlying adjustments.
- Export. JPG (pick quality 60-100) or PNG (lossless). Original untouched on your filesystem.
Examples
Input: 4032×3024 phone photo, crop to 1080×1350 (4:5)
Output: 1080×1350 JPG ~500KB-1.5MB; ready for Instagram portrait.
Input: Dark indoor shot, +30 brightness, +10 contrast
Output: Lifted exposure, retained detail.
Input: Color photo to B&W with filter
Output: Single-click conversion; tweak contrast for graphic black-and-white look.
Frequently asked questions
Does it support layers?
No — single-image edits only. For multi-layer composition, use Photoshop / GIMP / Photopea.
How does it compare to Photoshop?
Covers ~80% of common edits at zero cost and zero install. Photoshop wins for complex retouching, layer effects, advanced color grading.
Is the photo uploaded?
No — Canvas processes entirely in the browser. Privacy by design, even for sensitive images.
Will I lose quality?
JPG export at quality < 100 is lossy. PNG export is lossless. For repeated re-edits, save as PNG between sessions to avoid generation loss.
Are EXIF / metadata preserved?
Some editors strip metadata; this one preserves where possible. Personal details (location, camera) stay; manually strip in metadata-extractor if needed.
Can I batch-edit?
No — single image at a time. For batch resize / convert, use the image-format-batch-converter.
Pro tips
- Crop before color-grade — cropped composition affects which areas need adjustment.
- Export JPG for web (smaller); PNG for further editing or transparent backgrounds.
- Save originals; edits are non-destructive in this tool but only via browser undo. Once exported, the original on disk is your safety net.
- For batch-style consistency (e.g. all photos in a portfolio), apply the same adjustments to each.
- Test extreme adjustments — sliders at ±50 are usually too far. ±10-20 produces natural results.
Reviewed by Ahsan Mahmood · Last updated 2026-05-05 · Part of ZTools.
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