Tools & recent updates

Format, validate, sort, and minify JSON with exact error locations.

Reduce image size while controlling output quality.

Combine PDF files and arrange pages before export.

Convert text or files to and from Base64.

Convert Unix timestamps and human-readable dates.

Generate one or many standards-based UUIDs.

Test regular expressions with matches and capture groups.

Create strong passwords with clear entropy controls.

Create downloadable QR codes from text or URLs.

Count words, characters, sentences, and reading time.

Compare parsed JSON values and list structural changes by path.

Convert JSON and YAML in either direction with syntax validation.

Convert arrays of objects and tabular CSV in either direction.

Infer TypeScript interfaces from JSON objects and arrays.

Format, validate, minify, or convert JSON5 to strict JSON locally.

Parse, validate, format, and inspect YAML as a local tree.

Convert between JSON and Token-Oriented Object Notation with the reference implementation.

Convert JSON to an escaped string or JavaScript literal and restore it.

Turn JSON records into accessible HTML, TSV, or Markdown tables.

Convert XML, YAML, and CSV between common browser-safe text formats.

Parse RSS or Atom XML and export its full structure as JSON.

Preview HTML in a script-blocked sandbox and run local structural checks.

Validate XML and explore elements, arrays, text, and attributes in a collapsible tree.

Infer starter models for ten languages and JSON Schema from representative JSON.

Format GraphQL, Angular, Vue, LESS, SCSS, Babel, Flow, LWC, and Glimmer locally.

Format Markdown, GitHub-Flavored Markdown, and MDX with Prettier.

Escape or unescape JSON, JavaScript, Java, .NET, XML, CSV, and SQL text.

Reverse graphemes, split text, and inspect Unicode, octal, entities, and UTF-8 bytes.

Format or minify SQL with selectable database dialects.

Format, minify, validate, or convert XML and JSON locally.

Format CSS with Prettier or optimize it with CSSO locally.

Format HTML with Prettier or conservatively minify it locally.

Format modern JavaScript with Prettier or minify it with Terser locally.

Format TypeScript or transpile one file to JavaScript locally.

Encode or decode URL components and inspect query parameters.

Encode HTML entities and convert text to Unicode escapes.

Calculate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 together.

Calculate and verify MD5 or SHA checksums for local files.

Decode JWT headers and claims, inspect expiry, and verify HMAC signatures.

Compare two texts line by line with additions and removals.

Convert prose and identifiers between common letter cases.

Sort, reverse, trim, filter, and deduplicate text lines.

Turn titles into clean URL slugs with configurable separators.

Render CommonMark-style Markdown with raw HTML disabled.

Resize and center-crop images to exact pixel dimensions.

Convert PNG, JPEG, WebP, and supported AVIF images locally.

Decode HEIC or HEIF photos and export browser-friendly JPG or PNG.

Create image Data URIs or restore Base64 image data to a file.

Inspect EXIF, GPS, camera, and file metadata without uploading.

Read QR codes from local image files without camera permission.

Extract selected page ranges into a new local PDF.

Reorder, rotate, or remove PDF pages before export.

Add diagonal text watermarks and page numbers to a PDF locally.

Render PDF pages as downloadable PNG or JPEG images.

Combine JPEG, PNG, and WebP images into one PDF document.

Extract selectable text from every PDF page in the browser.

Build, validate, explain, and preview five-field cron schedules.

Generate sortable 128-bit ULIDs with cryptographic randomness.

Measure exact elapsed time and express it as an ISO 8601 duration.

Interpret a wall time in one IANA zone and compare it across other zones.

Look up public IP location, network, and ASN data with disclosed primary and fallback providers.

Calculate IPv4 network, broadcast, mask, and usable host ranges.

Search JSON with JMESPath expressions and export filtered results.

Convert pasted or local HTML to Markdown without fetching remote pages.

Optimize SVG locally, compare file sizes, and download the result.

Generate reproducible fake records with configurable fields as JSON or CSV.

Create ZIP archives and extract selected entries locally in your browser.

Convert cURL commands to JavaScript Fetch or Python Requests without executing requests.

Validate JSON against a user-provided schema after CSP feasibility review.

Generate downloadable linear barcodes.

Convert and preview common color spaces.

Inspect local SQLite databases and run queries in WebAssembly.

Candidate: extract image text after mobile performance evaluation.

Convert short local media to WAV, MP4 or WebM using supported browser codecs; remux compatible tracks without uploading files.