Free Tools

WunderPaint

Browser Tools for Images, WordPress and CSS That Never Upload a File

Over a hundred small tools, each built for a single job and finished in the tab you already have open. Nothing to install, nothing to sign up for, and the file you drop in stays on your own machine.

Tools – Category
Dithering Side by Side: Why Atkinson Looks Like a Mac and Bayer Like a Game

Photo Editing

Dithering Lab

Reduces a picture to a few colours with eight dithering methods side by side, on the same palette and the same pixels

Make a tidy application photo out of an ordinary phone snapshot

Photo Editing

Application photo from a phone snapshot

Finds the face, levels the head, cuts to print format and lays four copies on one sheet

Take the scratches and dust out of a scanned family photograph

Photo Editing

Old photo repair

Finds the thin scratches and fold lines, takes your corrections and inpaints the marks

Turn a phone photo of a document into something that looks scanned

Photo Editing

Document scan from a photo

Straightens the page onto a rectangle, takes the shading out and stacks pages into a ZIP

Spend your JPEG bits where the eye looks, not evenly across the frame

Photo Editing

Saliency guided JPEG

Smooths only what a saliency model says nobody looks at before the encoder sees it

Black out every piece of text in a screenshot before you share it

Security & Privacy

Screenshot redactor

Finds every field that looks like text, covers it all and lets you click back what stays

Repair a photo that messengers and re-saves have turned to blocks

Photo Editing

JPEG artefact repair

Rebuilds inside the eight by eight grid with a network trained on exactly that damage

Get a depth map from any photo and use it for real lens blur

Photo Editing

Depth map and lens blur

Estimates how far away every pixel is, shows the greyscale map and blurs by that distance

Remove an unwanted object from a photo without uploading it anywhere

Photo Editing

Object eraser

Rebuilds what was behind the area you paint over, with a small network called MI-GAN

Cut out hair from a photo without shaving the edges off

Photo Editing

Cutout with soft edges

Asks two small networks whether a pixel belongs to the subject, not what colour it is

Brighten dark photos in your browser with a 590 KB neural network

Photo Editing

Low light photo lifter

Runs a 590 KB neural network over a dark photo instead of pulling the brightness up

Content Aware Resize: Changing a Photo’s Shape Without Squashing Anyone

Photo Editing

Content Aware Resizer

Takes out the pixel seams carrying least detail instead of squashing or cropping

Responsive Hero Images: The Focal Point Decides Everything

WordPress Images

Hero crop simulator

Moves a focal point and shows what every breakpoint keeps of it, with the CSS to copy

Perspective Correction: Four Corners and One Matrix Put It Straight

Photo Editing

Perspective and keystone corrector

Solves the homography from four dragged corners and returns the flat picture and matrix3d

Remove Moire From a Scanned Image: Why Blurring Never Works

Photo Editing

Scan descreening workbench

Finds the halftone grid in the frequency picture of a scan and cuts those frequencies out

Fix White Balance: The One-Click Correction, Explained

Photo Editing

White balance fixer

Removes a cast from one click on something neutral and shows the three channel factors

AI Product Photos That Do Not Look Fake: Light, Shadow, Perspective

AI Images

Composite believability check

Walks three checks over a montage: light direction, shadow edge hardness and ground plane

A Web Performance Budget for Your WordPress Site

Speed & Performance

Page weight budget calculator

Turns a target load time and a connection into a byte budget per resource class

WordPress User Roles and Capabilities, Actually Explained

WordPress Development

User roles explorer

Compares the five default roles capability by capability and builds a custom one as code

WordPress File Permissions: 644, 755 and When Something Else

Security & Privacy

File permissions calculator

Keeps octal and symbolic spellings in sync and names the value each WordPress file needs

Upload Simulator: What WordPress Actually Writes to Disk

WordPress Images

Upload simulator

Writes out the sub-sizes, the bytes, the srcset and the file names one upload would make

Error Establishing a Database Connection: What WordPress Is Actually Telling You

Troubleshooting

Database error decoder

Turns the number in a connection error into a cause and checks the four wp-config lines

Rewrite Rule Tester: What Happens Between the URL and WP_Query

SEO & Structured Data

Rewrite rule tester

Walks a request path through the stored rules and shows the first match and its query

Permalink Structure Simulator: What That One Field Decides

SEO & Structured Data

Permalink structure simulator

Marks the structures WordPress treats as expensive and writes the redirects for a change

WordPress Maximum Upload Size: Where the Limit Really Lives

Troubleshooting

Upload and memory limit planner

Says which of the four PHP limits stops your file first and writes the lines that fix it

WordPress HEIC Upload: What Core Does and Why It Fails

Troubleshooting

HEIC file inspector

Reads brand, items, dimensions and rotation from a refused file and saves it as JPEG

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