DNS · Records
Query public records such as A, AAAA, MX, TXT, etc., and display TTL and parsing status.
MX · SPF · DKIM
View DKIM public records for MX, SPF, DMARC and the specified selector.
IP → PTR
Convert IPv4 or IPv6 to a reverse lookup name and view public PTR records.
CAA · TLS
Viewing the certificate issuance authority record for the current name does not replace the complete issuance policy check.
DNSSEC · AD
View the verification status of DNS responses, distinguishing between verified, unsigned, and failed queries.
IP · HTTP
Check the exit IP, region and network organization for accessing this site, and measure the time taken for small file HTTP requests.
Unix · Timezone
Convert seconds, milliseconds to datetime, clarify time zone and daylight saving time ambiguities.
URL · Query
Disassemble the link structure, edit query parameters item by item, and retain duplicate parameters and order.
JSON ↔ YAML
Convert JSON to YAML 1.2 in both directions, preserving large integers and numeric precision.
Cron · Next runs
Explain five Cron segments in Chinese and preview the next 10 run times by specified time zone.
1000 / 1024
Accurately convert between B, KB, MB and KiB, MiB.
IPv4 + CIDR
View address ranges, masks and host counts from IPv4 and CIDR.
Text ↔ Unicode
Convert text, Unicode code points, escape sequences, and HTML entities.
Decimal · BigInt
Preserve large numbers while formatting thousands separators, scientific notation, percentages and Chinese or English number words.
ASCII 0–127
Convert between ASCII characters and decimal, hexadecimal, binary encodings.
Base 2–36
Supports positive and negative integers from 2 to 36 bases, using BigInt to preserve precision.
Text · Naming
Convert case, title format, camel case, underline and dash naming.
Length · Mass · °C
Convert length, mass, volume and temperature, clearly distinguishing between US units of volume.
XML ↔ JSON
Structural transformations that preserve string values and attributes, accounting for irreversible XML semantics.
Browser · OS · Device
Identify browser, system and device clues from User-Agent text.
Format · Minify
Format, compress, and validate JSON, preserving the original text of large integers and numbers.
XML · Comments
Clean up XML by indenting or removing typographical whitespace, preserving comments.
YAML · Anchors
Validate YAML and clean up indentation, retain comments and anchors.
Prettier · Terser
Use Prettier to tidy up your code, or Terser to minify JavaScript.
Prettier · CSSO
Organize CSS layout or compress the size without executing the input code.
6 dialects
Typeset in SQL, PostgreSQL, MySQL, SQLite, T-SQL, or BigQuery dialects.
Edit · Preview
Edit, format, and safely preview Markdown; no HTML or scripts are executed.
UTF-8 ↔ Base64
Convert between UTF-8 text and Base64 / Base64URL.
Distinguish between the entire URL, a single parameter and form encoding, and handle percent sign escaping.
Decode ≠ Verify
View the JWT's headers, payload, and time fields; do not verify signatures.
UTF-8 · Digest
Computes the SHA-256, SHA-512, SHA-1, or MD5 digest of a text.
Web Crypto
Generate batches of strings from a chosen character set using the browser’s cryptographically secure random source.
Local · Secure random
Generate passwords using a cryptographically random source and guarantee that selected character categories are present.
UUID v4 · v7
Locally batch generate UUID v4 or timestamped v7 with switchable letter case.
Lines · Words
Compare two pieces of text line by line or word by word, preserving differences in spaces and line breaks.
Regex · Match
Run JavaScript regex in isolation, view matching, position and grouping, and automatically stop when timeout occurs.
Local tokenizer
Use o200k_base or cl100k_base tokenizer to count text tokens.
Role · Task · Rules
Organize roles, tasks, rules, and output formats into reproducible prompts.
18 templates
Search 18 templates by scene, replace placeholders and copy; no AI service is called.
Merge PDF
Combine page content from multiple PDFs into one new file in your chosen file order.
Organize PDF Pages
Read original page numbers, remove, move or rotate pages, then export a new PDF or split pages into files.
Excel / CSV Converter
Select an ordinary XLSX worksheet or UTF-8 CSV, preview its data and convert the file format.
Merge Spreadsheets
Align columns by header name and append data from multiple XLSX or CSV files into one table.
Clean and Deduplicate Spreadsheet
Trim cell whitespace, remove empty rows and deduplicate by selected columns or full rows, then export.
Word and Character Counter
Count Han characters, English words, Unicode characters, lines and paragraphs to check text length.
Text Cleaner
Clean spaces and blank lines, remove duplicate lines and optionally sort lists or pasted text.
Simplified / Traditional Chinese Converter
Convert articles and copy between Simplified Chinese and Taiwan or Hong Kong Traditional Chinese.
Image Joiner and Collage
Join images in order into a vertical strip, horizontal strip or grid with adjustable size, spacing and background.
Image Annotator
Add arrows, boxes and text to local images, with preview, undo and PNG export.
Local Background Remover
Export transparent PNG using a small foreground segmentation model that runs in the browser.
Image Object Detector and Counter
Detect common objects locally and view the annotation boxes and the number of each category.
Linux Command Quick Reference
Search for independently written descriptions of common commands, read-only examples, and easily overlooked limitations.
Regular Expression Templates
Check out common JavaScript regular rules, matching examples, and validation boundaries, and copy and test them yourself.
Local MicroPython Interpreter
Execute the short Python example in an isolated browser environment and see the printed results.
Video Clip to GIF
Capture short video clips locally, zoom out and generate looping GIFs.
Audio Clip Extractor
Extract audio tracks from local audio and video files and export two-channel WAV.
WebM Clip to MP4
Convert WebM clips to H.264/AAC MP4 in supported browsers.
Local Screen Recorder
You choose to share the window or screen, record the screen and download it locally.
Local Lua Interpreter
Run a short Lua example on a separate background thread and see the printed results or errors.
Read-only SQLite Viewer
Open a local SQLite file, select a common data table, and view fields and records in pages.
Chinese Kinship Calculator
Enter a Chinese kinship chain to view possible titles or reverse titles.
PDF to Image
Select a PDF page range, render it in the browser and download the PNG page by page.
Images to PDF
According to the order of the selected files, put the pictures on one page each and synthesize them into a local PDF.
Local OCR
Recognize English or Simplified Chinese in images in the browser and export editable text.
Image Table Draft Extractor
First recognize the text, then infer the rows and columns based on position and spacing, and export the TSV draft.
Pomodoro Timer
Set the focus duration and start, pause and continue countdown on the current page.
Life in Weeks
Use a grid per week to display the progress of a self-selected date range.
Meal Picker
Fill in the candidate menu and randomly select one each time to reduce the confusion of choice.
Tap Counter
Click the button to accumulate the number of times, and you can automatically turn on the short sound effects synthesized by the device.
Everyday Dry Humor
Randomly select an original daily short sentence to give your busy day a different perspective.
Warm Little Notes
Randomly select an original expression that respects each other's boundaries.
CJK Text Spacing
Automatically adjust the spaces between Chinese, English, and numbers to make mixed text more readable.
ASCII Art Text
Use Standard fonts to arrange letters and numbers into reproducible character paintings.
Local Text to Speech
Select the native voice already available on your device to read the currently entered text.
Basic Rich Text Editor
Edit bold, italics and lists locally and export basic formatting as HTML.
ZIP Archive
Compress local files to a ZIP, or download files within a ZIP one by one.
GIF Maker
Combine multiple pictures into a looping GIF in file order and set the frame interval.
GIF Frame Splitter
Restore the complete frame of GIF animation locally and export PNG frame by frame.
Image Compressor
Re-encode JPEG/WebP in browser, compare original file and output size.
Text to Image
Set the canvas, font size and color, and format multi-line text into PNG images.
QR Code Tool
Generate QR codes with safety margins, or identify the text content of local QR code images.
Image Base64
Convert a local image to a Data URL, or restore a valid image Data URL to a file.
Image Resizer
Scale proportionally to the target width, or resample the image to a specified width and height.
Image Pixel Color Picker
Read the color of the specified coordinates of the image and output HEX, RGB, HSL and transparency.
Image Format Converter
Convert images between browser-supported PNG, JPEG, and WebP formats.
Image Text Watermark
Add a custom text watermark in the lower right corner of the image and choose a font size and color.
Nine-grid Image Splitter
Divide the picture into nine adjacent areas and export them in order from left to right and top to bottom.
Image Patina
Combine low-resolution sampling, color casts, noise, and JPEG compression to create aged images.
Mirage Tank Image
Map the two images into grayscale transparent PNGs, showing different content on white and black backgrounds.
Image Crop and Rotate
Crop pictures by pixels, rotate them at right angles and flip them horizontally or vertically.
Image Sketch
Convert the image to grayscale edge line art locally, retaining original transparency.
Image Invert
Invert RGB channels pixel-by-pixel while keeping transparency unchanged.
Factorial Calculator
Exactly compute integer factorials from 0 to 5000 without losing large integer digits.
BMI Calculator
Calculate adult BMI values in kilograms and centimeters to clarify the applicable range.
Date Calculator
Calculate the number of days between two calendar dates, or add or subtract days to a date.
Sexagenary Year
Check the name of the Sixty Years corresponding to the Gregorian calendar year.
Signed Binary Representations
View the sign bit representation, one's complement, and two's complement representation of an integer with a specified word length.
Random Integer Generator
Generates integers within a specified range using a cryptographically random source, optionally without repetition.
Morse Code
Convert between Latin letters, numbers, common punctuation, and international Morse code.
Styled Unicode Text
Convert English letters and numbers to bold, circled, or full-width Unicode characters.