46 developer tools.
One keystroke away.

Run jq programs or JSONPath queries against JSON and see results live.

Format, validate and minify JSON with 2, 4 or 8 space indentation.

Edit Markdown and preview the rendered result live, with HTML export.

Convert between YAML and JSON with control over indentation and style.

Check YAML syntax and see the parsed structure as JSON.

Lint a Dockerfile for syntax problems and common best-practice issues.

Build GitHub Actions workflow YAML from triggers, jobs and starter templates.

Generate a .gitlab-ci.yml with stages, jobs and scripts from templates.

Parse, build and explain cron expressions with upcoming run times.

Escape and unescape HTML, JSON, backslash, shell and unicode strings.

Write HTML and see it rendered live in a sandboxed preview.

Generate UUID v1, v4, v7, ULID and NanoID in bulk, and decode timestamps.

Convert hex, decimal, octal and binary with a clickable bit grid.

Test regular expressions with live match highlighting and capture groups.

Compare semantic versions, bump them and test them against ranges.

A quick scratch terminal with your default shell, inside the app.

Side-by-side text diff with word-level highlights and a JSON mode.

Build cURL commands from a form, or import an existing one.

Query DNS records with any resolver and run WHOIS lookups.

Calculate IPv4 subnets from CIDR, split networks and plan VLSM.

Send HTTP requests and inspect status, headers, body and timing.

Preview how a URL unfurls on social platforms and audit its meta tags.

Encode and decode URLs and query strings in either direction.

Build, validate and bulk-generate UTM campaign links.

Create sample webhook payloads and send them to any URL.

Run a local HTTP endpoint and inspect every request it receives.

Turn one image into favicon, PWA, iOS, Android, macOS, Windows and Tauri icons.

Turn code into syntax-highlighted PNG images for docs, slides and social posts.

View photo metadata, spot embedded GPS, and strip it before sharing.

Shrink PNG, JPEG and WebP files in batch with oxipng and mozjpeg.

Convert PNG, JPEG, WebP and AVIF images in batch, offline.

Batch resize images with social presets, or crop a single image visually.

Extract dominant colors from an image as hex, CSS variables or Tailwind tokens.

Optimize SVG markup with SVGO and rasterize it to PNG at any size.

Encode and decode Base64 for text, files, URL-safe strings and images.

Parse PEM certificates and inspect the TLS certificate chain of a host.

MD5, SHA, BLAKE3 and CRC32 hashes and HMAC for text and files.

Decode, verify and re-sign JSON Web Tokens locally.

Fetch a URL and grade its HTTP security headers with fix suggestions.

Pick a color and convert it between HEX, RGB, HSL and OKLCH.

Generate themed placeholder text as paragraphs, sentences, words or lists.

A multi-tab scratchpad that keeps your notes between sessions.

Generate QR codes for text, URLs and WiFi, and decode them from images.

Generate random strings with custom length and character sets.

Convert Unix timestamps to readable dates and back.

Convert a time to several timezones at once, with a live world clock.