Chess Position Editor - Online Setup Board & Export FEN
Drag and drop pieces to set up a chess position. Generate FEN string and copy to share. Analyze openings. Local only.
UD5 Toolkit
Drag and drop pieces to set up a chess position. Generate FEN string and copy to share. Analyze openings. Local only.
Add multiple CSS filters (grayscale, blur, hue‑rotate) to an image. See the combined effect. Copy the CSS filter value.
Automatically crop transparent or solid‑color borders from any image. Just drop the photo and get the tight crop.
Paste two Markdown texts and see a side‑by‑side diff with rendered preview. Perfect for editing and collaboration.
Set start and end times for a video and trim it without re-encoding. Download the clip. Pure browser.
View, edit, and manage JSON objects saved in your browser's localStorage. Delete, export, or import keys. No setup.
Load an audio file and visually trim it by dragging handles on the waveform. Export the trimmed clip. All local.
Write a paint worklet in JavaScript and see it used as a CSS background instantly. Experiment with Houdini. Local.
Add customizable padding to any image. Make it square or fit a specific aspect ratio by adding whitespace. Download padded PNG.
A visual guide to common copy‑editing and proofreading symbols. Click a mark to see its meaning. For writers.
Select a part of an audio file and trim it to the selection. Playback preview. Download the cropped audio. No upload.
Remove silent parts from an audio recording. Useful for podcasts and lectures. Set threshold and minimum silence duration.
View and edit CSV data in a familiar table interface. Add/delete rows and columns, sort, and export. Fully local, no cloud sync.
Apply a precise rounded corner effect to an image by cropping with a mask. Download as transparent PNG. All local.
Build cron expressions using a visual editor with dropdowns. See human-readable description and next run times. Easier than raw cron.