您需要的每一个工具， 都在这里。

Pretty-print JSON with custom indentation.

Check JSON syntax and get precise error locations.

Compare two JSON documents side by side.

Turn a JSON array into a CSV file.

Generate TypeScript interfaces from JSON.

Infer a JSON Schema from sample data.

Decode a JWT's header and payload.

Fix common JSON mistakes automatically.

Resize images by exact pixels or percentage with aspect-ratio lock and social presets.

Crop images with a drag-to-select box, aspect presets, and live dimension readout.

Shrink image file size with a quality slider, format choice and max-dimension scaling.

Download any YouTube video's thumbnail image in all available qualities.

Convert JPG to PNG in your browser.

Convert JPG to WEBP in your browser.

Convert JPG to PDF in your browser.

Convert PNG to JPG in your browser.

Convert PNG to WEBP in your browser.

Convert PNG to SVG in your browser.

Convert WEBP to JPG in your browser.

Convert SVG to PNG in your browser.

Convert WEBP to PNG in your browser.

Pick any color from an image - click to get HEX, RGB and HSL with copy buttons and a magnifier.

Extract 6 dominant colors from any image, copy HEX codes, export CSS variables or a PNG strip.

Turn any image into favicons: 16/32/48/180/192/512 PNGs plus a multi-size ICO, or all as ZIP.

Convert every PDF page into a JPG image.

Combine one or more JPG images into a single PDF.

Combine multiple PDF files into one document.

Split a PDF into individual pages or custom ranges.

Reduce PDF file size by re-encoding embedded content.

Add a password to prevent unauthorised access.

Extract all plain text from a PDF file.

Rotate individual pages or the whole PDF.

Inspect title, author, dates, and other metadata.

Reduce video file size with quality, resolution, and format controls.

Cut a precise section from a video using start and end times.

Convert videos between MP4, WebM, MOV, and MKV with quality controls.

Resize videos for Reels, Shorts, TikTok and feeds with aspect presets and blur-fill.

Extract MP3 audio from MP4 and other video files.

Convert a short video section to an animated GIF.

Capture a PNG or JPG thumbnail from any timestamp.

Resize video dimensions with aspect-ratio locking and presets.

Create a silent video by removing the audio track.

Convert any audio file to MP3 with selectable bitrate.

Convert between MP3, WAV, OGG, FLAC, M4A, AAC and more.

Extract the audio track from an MP4 video and save it as MP3.

Cut an MP3 file - select start and end points and save the section.

Cut audio files in any supported format by selecting a range.

Reduce MP3 file size by re-encoding at a lower bitrate.

Merge multiple MP3 files into a single audio file.

Join multiple audio files of any format into a single output.

Convert MP3 audio to uncompressed WAV format.

Convert WAV audio to compressed MP3 with bitrate control.

Convert M4A (Apple audio) files to widely compatible MP3.

Increase the volume of an MP3 file with gain control.

Generate QR codes for URLs, text, WiFi, email, phone, vCard, and more.

Generate QR codes with a custom or social logo overlay for URLs, text, WiFi and more.

Scan QR codes using your device camera in real time.

Upload a QR code image and decode its content instantly.

Create a QR code your guests can scan to join your WiFi network.

Generate barcodes in CODE128, CODE39, EAN-13, UPC, ITF-14 and more.

Generate Code 128, EAN-13, EAN-8, UPC-A or Code 39 barcodes with a custom or social logo overlay.

Scan barcodes live using your device camera.

Upload a barcode image and decode its value automatically.

Generate valid UPC-A barcodes with automatic check digit calculation.

Generate EAN-13 (and EAN-8) barcodes with correct check digit validation.

Generate Code 128 barcodes supporting full ASCII text.

Calculate monthly loan payments for any principal, interest rate, and loan term.

Calculate gross, operating, or net profit margin as a percentage of revenue.

Project how your savings grow with regular contributions and compound interest over time.

Calculate return on investment (ROI) percentage and net gain for any investment.

Use the debt snowball method - pay smallest balances first to build momentum.

Find out how long it takes to pay off your credit card balance and total interest paid.

Convert an hourly wage to annual, monthly, bi-weekly, and weekly salary equivalents.

Add or remove sales tax from any price and find the pre-tax or post-tax amount.

Count words, characters, sentences and paragraphs with reading time and keyword density.

Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case and more.

Generate placeholder text by paragraphs, sentences or words for mockups and layouts.

Percent-encode and decode URLs with encodeURIComponent and full-URI modes.

Generate strong random passwords with Web Crypto - length, character sets, entropy meter.

Test regular expressions live with match highlighting, capture groups and a cheatsheet.

Generate bulk v4 UUIDs with Web Crypto - uppercase/lowercase, hyphens on/off, copy all.

Hash text or files with MD5, SHA-1, SHA-256, SHA-384, SHA-512 - in your browser.

Convert Unix timestamps (seconds/ms auto-detect) to dates and back, UTC/local, relative time.

X% of Y, X is what % of Y, and percentage increase/decrease - three modes.

Body Mass Index with metric/imperial toggle, category and healthy range indicator.

Age in years/months/days from date of birth, totals, weekday born, next birthday countdown.