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Format, validate, and explore JSON with syntax highlighting, tree view, minimap, and local history.

Validate JSON against JSON Schema, generate starter schemas, and inspect Ajv validation errors locally.

Convert between JSON, YAML, and CSV for configs, API examples, and fixtures.

Generate TypeScript interfaces from representative JSON payloads locally.

Preview OpenAPI and Swagger specs, inspect endpoints, and copy request summaries from JSON or YAML.

Format JavaScript, TypeScript, JSON, CSS, HTML, Markdown, and YAML with Prettier in the browser.

Format SQL queries, switch dialects, minify output, and copy clean database snippets.

Convert cURL commands into fetch, axios, Python requests, and readable request details.

Convert Unix timestamps, compare timezones, and detect timestamps in logs.

Validate five-field cron expressions, use presets, and preview upcoming run times.

Encode and decode URL components safely for query strings, logs, and API payloads.

Generate QR code PNGs and decode QR images without uploading payloads.

Calculate IPv4 CIDR ranges, subnet masks, wildcard masks, host counts, and membership checks.

Compress and decompress text with gzip and deflate using the browser Compression Streams API.

Decode JWT headers and payloads, inspect timing claims, and copy token sections locally.

Verify HS256 JWT signatures, inspect JWK fields, and convert shared secrets without sending tokens away.

Generate SHA hashes, HMAC signatures, and local file checksums with Web Crypto.

Generate strong passwords and passphrases, then inspect otpauth/TOTP codes locally.

Encode, decode, and inspect Base64 variants with client-side processing.

Create UUID v4, ULID, and Nano ID batches for tests, fixtures, databases, and APIs.

Inspect EXIF, GPS, XMP, IPTC, and image headers, edit JPEG EXIF, and view photo GPS on a map.

Compress, resize, convert, compare savings, and download JPG, PNG, WebP, and AVIF images locally.

Compress local images and folders into WebP, JPEG, PNG, or AVIF with progress and ZIP downloads.

Batch resize, rename, watermark, strip metadata, and export optimized images from one local workspace.

Record your screen, preview captures, and export local recordings without sending media to a server.

Test JavaScript regular expressions, flags, indexes, and capture groups in real time.

Compare text or JSON snippets line by line and copy a unified diff locally.

Preview Markdown, render Mermaid diagrams, and copy clean HTML from local document drafts.

Convert HEX, RGB, and HSL colors, check WCAG contrast, and generate accessible shade ramps.