Tools
Find the right tool for the task.
Every page explains what the tool does, where data is processed, and which limits apply.
All tools
Use ⌘ K anywhere on the site to search by tool name or task.
JSON Formatter & Validator
Format, validate, sort, and minify JSON with exact error locations.
Image Compressor
Reduce image size while controlling output quality.
PDF Merge
Combine PDF files and arrange pages before export.
Base64 Encode & Decode
Convert text or files to and from Base64.
Timestamp Converter
Convert Unix timestamps and human-readable dates.
UUID Generator
Generate one or many standards-based UUIDs.
Regex Tester
Test regular expressions with matches and capture groups.
Password Generator
Create strong passwords with clear entropy controls.
QR Code Generator
Create downloadable QR codes from text or URLs.
Word Counter
Count words, characters, sentences, and reading time.
JSON Diff
Compare parsed JSON values and list structural changes by path.
JSON to YAML Converter
Convert JSON and YAML in either direction with syntax validation.
JSON to CSV Converter
Convert arrays of objects and tabular CSV in either direction.
JSON to TypeScript
Infer TypeScript interfaces from JSON objects and arrays.
JSON5 Formatter and Validator
Format, validate, minify, or convert JSON5 to strict JSON locally.
YAML Formatter and Validator
Parse, validate, format, and inspect YAML as a local tree.
JSON to TOON Converter
Convert between JSON and Token-Oriented Object Notation with the reference implementation.
JSON Stringify and Unescape
Convert JSON to an escaped string or JavaScript literal and restore it.
JSON to HTML, TSV, and Markdown Table
Turn JSON records into accessible HTML, TSV, or Markdown tables.
XML, YAML, and CSV Converter
Convert XML, YAML, and CSV between common browser-safe text formats.
RSS and Atom to JSON Converter
Parse RSS or Atom XML and export its full structure as JSON.
HTML Preview and Validator
Preview HTML in a script-blocked sandbox and run local structural checks.
XML Tree Viewer
Validate XML and explore elements, arrays, text, and attributes in a collapsible tree.
JSON Data Model Generator
Infer starter models for ten languages and JSON Schema from representative JSON.
Web Code Formatter
Format GraphQL, Angular, Vue, LESS, SCSS, Babel, Flow, LWC, and Glimmer locally.
Markdown and MDX Formatter
Format Markdown, GitHub-Flavored Markdown, and MDX with Prettier.
String Escape and Unescape
Escape or unescape JSON, JavaScript, Java, .NET, XML, CSV, and SQL text.
Unicode String Inspector
Reverse graphemes, split text, and inspect Unicode, octal, entities, and UTF-8 bytes.
SQL Formatter
Format or minify SQL with selectable database dialects.
XML Formatter and Converter
Format, minify, validate, or convert XML and JSON locally.
CSS Formatter and Minifier
Format CSS with Prettier or optimize it with CSSO locally.
HTML Formatter and Minifier
Format HTML with Prettier or conservatively minify it locally.
JavaScript Formatter and Minifier
Format modern JavaScript with Prettier or minify it with Terser locally.
TypeScript Formatter and JavaScript Transpiler
Format TypeScript or transpile one file to JavaScript locally.
URL Encoder and Decoder
Encode or decode URL components and inspect query parameters.
HTML Entity and Unicode Converter
Encode HTML entities and convert text to Unicode escapes.
Hash Generator
Calculate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 together.
File Checksum Calculator
Calculate and verify MD5 or SHA checksums for local files.
JWT Decoder and Verifier
Decode JWT headers and claims, inspect expiry, and verify HMAC signatures.
Text Diff
Compare two texts line by line with additions and removals.
Case Converter
Convert prose and identifiers between common letter cases.
Line Sort and Deduplicate
Sort, reverse, trim, filter, and deduplicate text lines.
Slug Generator
Turn titles into clean URL slugs with configurable separators.
Markdown Preview
Render CommonMark-style Markdown with raw HTML disabled.
Image Resizer and Cropper
Resize and center-crop images to exact pixel dimensions.
Image Format Converter
Convert PNG, JPEG, WebP, and supported AVIF images locally.
HEIC to JPG and PNG
Decode HEIC or HEIF photos and export browser-friendly JPG or PNG.
Image to Base64 and Data URI
Create image Data URIs or restore Base64 image data to a file.
Image Metadata Viewer
Inspect EXIF, GPS, camera, and file metadata without uploading.
QR Code Scanner
Read QR codes from local image files without camera permission.
Split PDF
Extract selected page ranges into a new local PDF.
Rotate and Reorder PDF
Reorder, rotate, or remove PDF pages before export.
PDF Watermark and Page Numbers
Add diagonal text watermarks and page numbers to a PDF locally.
PDF to Images
Render PDF pages as downloadable PNG or JPEG images.
Images to PDF
Combine JPEG, PNG, and WebP images into one PDF document.
Extract Text from PDF
Extract selectable text from every PDF page in the browser.
Cron Expression Generator
Build, validate, explain, and preview five-field cron schedules.
ULID Generator
Generate sortable 128-bit ULIDs with cryptographic randomness.
ISO 8601 Duration Calculator
Measure exact elapsed time and express it as an ISO 8601 duration.
Time Zone Converter
Interpret a wall time in one IANA zone and compare it across other zones.
IP Address Lookup
Look up public IP location, network, and ASN data with disclosed primary and fallback providers.
CIDR Subnet Calculator
Calculate IPv4 network, broadcast, mask, and usable host ranges.
JSON Query
Search JSON with JMESPath expressions and export filtered results.
HTML → Markdown
Convert pasted or local HTML to Markdown without fetching remote pages.
SVG Optimizer
Optimize SVG locally, compare file sizes, and download the result.
Mock Data Generator
Generate reproducible fake records with configurable fields as JSON or CSV.
ZIP Tools
Create ZIP archives and extract selected entries locally in your browser.
cURL → Code
Convert cURL commands to JavaScript Fetch or Python Requests without executing requests.
JSON Schema Validator
Validate JSON against a user-provided schema after CSP feasibility review.
Barcode Generator
Generate downloadable linear barcodes.
Color Converter
Convert and preview common color spaces.
SQLite Workspace
Inspect local SQLite databases and run queries in WebAssembly.
Image OCR
Candidate: extract image text after mobile performance evaluation.
Media Converter
Convert short local media to WAV, MP4 or WebM using supported browser codecs; remux compatible tracks without uploading files.
Start from the job
Browse by task
Format & Validate
Clean structured data and catch syntax errors.
JSON Formatter · SQL Formatter · Line ToolsEncode & Decode
Transform text and data between common encodings.
Base64 · URL Encoder · HTML EntitiesConvert Data & Files
Change image, document, and data formats locally.
JSON ↔ YAML · Image Converter · PDF to ImagesGenerate
Create identifiers, secrets, codes, and test data.
UUID · ULID · PasswordCompare
Find structural and line-level changes between inputs.
JSON Diff · Text DiffInspect
Examine patterns, metadata, headers, and values.
Regex Tester · Image Metadata · IP Lookup