Free tools that work
right in your browser
33 free tools for everyone — resize images, convert colors, format JSON, decode files, and more.Nothing ever leaves your device.
33
Tools
0
Server uploads
100%
Client-side
∞
Free forever
Smart paste — we detect what it is
JSON
4 toolsJSON Formatter
Format, beautify, and minify JSON instantly in your browser. Syntax highlighting, error detection, sort keys, and one-click Fix. Your data never leaves your device.
JSON Validator
Validate JSON with precise error location and human-friendly explanations. Supports JSON5 and JSONC with comments and trailing commas. 100% client-side.
JSON Viewer
Explore JSON as a collapsible tree with virtualized rendering for 100k+ nodes. Search keys and values, copy JSONPath, and navigate large structures instantly.
JSON Diff
Compare two JSON objects semantically — key-order insensitive. Side-by-side color-coded diff with added, removed, and changed values highlighted clearly.
Converters
6 toolsJSON to CSV
Convert JSON arrays to CSV instantly. Handles nested objects with dot-notation flattening, custom delimiters, and large files via Web Worker. No data uploaded.
CSV to JSON
Convert CSV files to JSON arrays instantly in your browser. Auto-detects headers and delimiters, handles quotes and escaping correctly. Your data stays private.
JSON to YAML
Convert JSON to YAML format instantly in your browser. Clean, readable output with proper indentation. No upload, no account — 100% private.
YAML to JSON
Convert YAML to JSON instantly in your browser. Handles multi-document YAML, anchors, and aliases. Your configuration data stays completely private.
JSON to XML
Convert JSON to XML in your browser. Choose root element name, handle arrays with configurable element names. Zero uploads, zero tracking.
XML to JSON
Convert XML to JSON instantly in your browser. Handles attributes, namespaces, and CDATA sections. Fast, private, and works offline.
Encoders
4 toolsJWT Decoder
Decode JWT headers and payloads instantly. Human-readable claim table, expiry countdown, and optional signature verification via WebCrypto. Token never uploaded.
Base64 Encode
Encode text or files to Base64 in your browser. URL-safe variant, data URI generator, image preview for encoded images. Nothing is uploaded or stored.
Base64 Decode
Decode Base64 strings to text or files in your browser. Auto-detects image data and shows a preview. URL-safe variant supported. Completely private.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, and HMAC hashes for text or files (including files over 1GB). Streaming, private, and 100% browser-based.
Text
2 toolsRegex Tester
Test regular expressions live with match highlighting, capture group tables, and replace preview. Includes a cheatsheet of common patterns. 100% in-browser.
Diff Checker
Compare two texts side-by-side or inline. Word, character, and line diff modes, ignore-whitespace and ignore-case toggles. Your content never leaves your browser.
Web
4 toolsSVG Optimizer
Optimize SVG files with SVGO in your browser. Per-plugin checkboxes, before/after size comparison, live visual preview, export as SVG or PNG. No upload.
Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Live current timestamp, auto-detect seconds/milliseconds, timezone selector, ISO 8601 output.
Cron Parser
Parse cron expressions into plain English, see the next 10 run times, and build expressions with an interactive field-by-field UI. Works offline.
Color Converter
Convert colors between HEX, RGB, HSL, OKLCH, and LAB. Live swatch preview, EyeDropper API, and WCAG contrast checker. All in your browser, no upload.
Images
2 toolsImage Converter
Convert images between JPEG, PNG, and WebP formats instantly in your browser. Adjust quality, preview before/after, and download. No upload — 100% private.
Image Resizer
Resize images to exact pixel dimensions in your browser. Lock aspect ratio, choose fit mode, set output format and quality. Your images stay completely private.
PDF Merger
Combine multiple PDF files into one in your browser. Drag to reorder pages, merge instantly, download. Your files never leave your device.
PDF Splitter
Split a PDF into individual pages or extract custom page ranges in your browser. No upload, no watermark, completely free.
PDF to Images
Convert every page of a PDF to a JPG or PNG image in your browser. Choose resolution, preview each page, download individually. No upload needed.
Images to PDF
Convert JPG, PNG, or WebP images into a single PDF in your browser. Drag to reorder, choose page size, download instantly. Completely private.
Rotate PDF
Rotate individual or all pages of a PDF by 90°, 180°, or 270° in your browser. Preview, rotate, download. No upload, no watermark.
Compress PDF
Reduce the size of your PDF in your browser by removing metadata and optimizing structure. No upload, no quality loss on text and vectors.
Protect PDF
Add a password to your PDF to prevent unauthorized access. Set open and permissions passwords. Everything runs in your browser — your PDF is never uploaded.
Unlock PDF
Remove the password from a PDF you own. Enter the password, download the unlocked version. Runs entirely in your browser — completely private.
Watermark PDF
Add a custom text watermark to every page of your PDF in your browser. Set opacity, position, angle, and font size. No upload, no watermark on the output.
PDF Page Numbers
Add page numbers to every page of your PDF in your browser. Choose position, starting number, font size, and format. No upload, instant download.
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How it works
Here's exactly what happens when you use a Parsely tool — no surprises.
Paste, type, or drop a file
Your data goes straight into the tool on your screen. Nothing is sent anywhere.
Your browser does the work
Everything runs locally — even large files are processed in a background thread so the page stays fast.
Copy or download the result
Done. Your data never left your device and nothing was stored on any server.
Your files stay private
Nothing is uploaded. Everything runs in your browser tab — images, text, passwords, all of it.
Instant, no waiting
No servers to round-trip. Results appear immediately, even on large files.
Works without internet
Install it once and every tool works offline. Great on planes, trains, or spotty connections.