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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​

  1. Upload photo — Drag-drop or pick. JPG / PNG / WebP supported. Max practical size ~30MB before browser slowdowns.
  2. Crop / rotate — Free crop, aspect-ratio-locked crop (1:1, 4:5, 16:9, 3:2), 90° rotation, free rotation with slider.
  3. Apply adjustments — Brightness, contrast, saturation, hue, sharpen, vignette. Real-time preview; sliders normalised to ±100.
  4. Apply filters (optional) — Pre-set looks: warm, cool, B&W, sepia, vintage, faded. Combinations of underlying adjustments.
  5. 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.

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.

Try it now​

The full photo-editor runs in your browser at https://ztools.zaions.com/photo-editor — no signup, no upload, no data leaves your device.

Open the tool ↗

Last updated: 2026-05-05 · Author: Ahsan Mahmood · Edit this page on GitHub