Image tools

Batch image processor

Build a reorderable workflow from crop, background removal, resize, rotation, compression, conversion, watermarking, colour adjustment, and metadata removal, then run it across images, folders, or ZIP files.

Crop image

Crop several images freehand or by exact pixels, with common and custom ratios, composition guides, straightening, 90° rotation, flipping, per-image review, and batch export.

Split image

Cut images into grids, fixed-size tiles, long-image sections, or manually placed guides for social grids, web captures, print slices, and asset extraction.

Image Studio

Start with images, a folder or a ZIP. Choose compression, cropping, resizing, format conversion, watermarks or redaction, then pass the results to another tool. Your images stay in your browser.

Stitch images

Arrange images by drag order and combine them vertically, horizontally, or in a grid with controllable gaps, alignment, and sizing, while previewing the complete composition.

Resize image

Resize JPG, PNG, WebP, and AVIF images in batches by dimensions, percentage, long or short edge. Fit, crop, pad, prevent enlargement, and create multiple sizes locally in your browser.

Extend image canvas

Add independent padding around an image without cropping it, choose the image anchor, and export with a transparent or solid-colour canvas.

Social media image resizer

Create Instagram, Stories, Open Graph, X, and YouTube sizes in one pass, with safe-area guides that help keep important content clear of interface overlays.

Compress image

Compress JPG, PNG, WebP, and AVIF images in batches with smart optimisation, a target KB limit, or manual quality and dimension controls. WASM encoding runs locally in your browser.

Convert image format

Batch-convert JPEG, PNG, WebP, AVIF, still GIF frames, and HEIC for free, with several formats per image and private local processing.

Image and Base64 converter

Convert image files to Data URLs and decode image Data URLs back to files, with a copyable text result and a downloadable image preview.

Edit image

Rotate, flip, and apply practical tonal adjustments with undo and redo for quick corrections that do not need a layered graphics editor.

Add an image watermark

Apply text or image watermarks to a batch and control position, size, angle, opacity, outline, shadow, background, and tiled repetition.

Redact faces and private details

Redact faces, number plates, IDs, addresses, QR codes, and screen details locally in batches with rectangles, ellipses, a brush, reviewable face suggestions, solid cover, pixelation, and blur.

Adjust image colours

Tune exposure, brightness, contrast, saturation, hue, temperature, gamma, sharpness, and blur while using a histogram and same-size comparison to judge the result.

Image colour picker

Sample any pixel as HEX, RGB, HSL, and alpha, then extract dominant colours and their shares for design, branding, and visual analysis.

Replace an image colour

Sample and replace a colour with adjustable tolerance and edge feathering, preserve luminance when needed, or make the selected colour transparent.

Compare images

Inspect two images with slider, side-by-side, flicker, and single-image views, then calculate changed pixels, change percentage, and mean pixel error.

View and remove image metadata

Inspect dimensions, format, capture details, dates, and GPS metadata, highlight privacy risks, and export a re-encoded copy with metadata removed.

Find duplicate images

Find exact copies with file hashes and visually similar images with perceptual difference hashes, then recommend a version to keep by resolution and file size.

Create GIF from images

Turn ordered still images into a GIF with per-frame delays, loop count, colour count, dithering, and compression controls.

Extract GIF frames

Read a GIF timeline and export frames by start, end, and interval while preserving timing information for inspection or reuse.

Edit animated GIF

Edit frame range, order, speed, dimensions, crop, and rotation, then control colour quantisation and dithering for the exported animation.

Compress GIF

Reduce GIF size through frame sampling, resizing, palette size, playback speed, dithering, and lossy compression while balancing motion and quality.

GIF to sprite sheet

Lay out GIF frames as a sprite sheet and export frame coordinates for web animation, game assets, or front-end packaging.

Images to PDF

Combine ordered images into a PDF with page size, orientation, and margin controls for scans, receipts, assignments, and portfolios.

Favicon and app icon generator

Generate favicon, PWA, and common app-icon sizes from one source, with safe-area and background controls plus a web app manifest.

Image placeholder generator

Create BlurHash, ThumbHash, and tiny-image placeholders for a stable lightweight preview while the full image loads.

Sprite sheet maker

Pack small images into a sprite sheet with configurable columns and gaps, and export JSON coordinates plus CSS background positions.

Remove image background locally

Remove backgrounds locally with a fast portrait model or a finer general model, then reuse the mask with transparency, a solid colour, or another image.

Image to text (OCR)

Recognise Simplified Chinese, Traditional Chinese, or English text locally and export readable text plus structured JSON with confidence data.

Document photo scanner

Detect and refine page corners, correct perspective, apply colour, greyscale, or black-and-white enhancement, and optionally combine pages into a PDF.

Upscale image

Use local Real-ESRGAN inference to double image width and height; the verified model is cached after its first download and the page shows the current device limit.

ID photo maker

Prepare ID photos with composition guides, cropping, sizing, optional background replacement, and file-size control; local face detection remains a suggestion for manual approval.

China passport photo

Check and prepare dimensions, composition, format, and file size against the China passport preset, then verify current requirements with the receiving authority.

China identity card photo

Assist with composition, dimensions, and file checks for China identity-card photos without replacing official capture or acceptance review.

China teacher qualification exam photo

Prepare composition, dimensions, format, and file size for China’s teacher qualification exam photo upload and reduce avoidable file-validation failures.

China civil service exam photo

Follow a guided preset for China civil service exam photos, covering composition, pixels, format, and file size with clear manual checks.

Hubei social security card photo

Check composition, dimensions, format, and size against the Hubei social security card preset, subject to the latest official collection rules.

U.S. visa photo

Assist with square crop, head placement, dimensions, and file checks based on published U.S. visa photo rules; official review remains decisive.

U.S. passport photo

Check the file format of a U.S. passport photo and view the original. No editing or automatic assessment of head proportions, background or recency.

UK passport photo checker

Check a UK digital passport photo’s pixel dimensions, JPEG format and file size locally. Keep the original for your application.

Canada permanent resident photo

Check pixel dimensions, JPEG format and file size for a Canadian PR digital photo. Review composition and photography requirements separately.

Japan visa photo

Prepare crop, composition, dimensions, and file output for a Japan visa photo preset, then confirm recency and background rules with the relevant mission.