The Dev Tools

All developer tools

62 browser-based utilities. JSON, encoding, CSS, timestamps, generators, and more — nothing is uploaded.

JSON & Data

14 tools

codeJSON FORMATT

JSON Formatter

Format, minify, tree view, sort keys, .json download. Error line and column. Nothing uploaded.

→codeJSON EDITOR

JSON Editor

Edit JSON with syntax highlighting. Use JSON Formatter to pretty-print.

→data_objectJSON ESCAPE

JSON Escape

Escape raw text into a JSON-safe string or unescape a JSON string back to plain text.

→list_altJSONL VALIDA

JSONL Validator

Validate JSON Lines and convert valid records to a JSON array.

→table_chartCSV TO JSON

CSV to JSON

Convert CSV data to a JSON array. Supports headers and custom delimiters.

→grid_onJSON TO CSV

JSON to CSV

Convert a JSON array of objects to CSV format.

→table_rowsTSV TO JSON

TSV to JSON

Convert tab-separated values to JSON. Paste directly from Excel.

→border_allJSON TO TSV

JSON to TSV

Convert JSON to tab-separated values for Excel or Google Sheets.

→codeXML TO JSON

XML to JSON

Convert XML to JSON. Handles nested elements and attributes.

→linkQUERY PARAMS

Query Params → JSON

Parse URL query parameters into a structured JSON object.

→table_viewCSV VIEWER

CSV Viewer

View, search, and sort CSV files as a table. Drag and drop to load.

→tableEXCEL TO HTM

Excel to HTML

Convert spreadsheet rows into an HTML table.

→swap_horizYAML JSON

YAML ↔ JSON

Convert YAML config files to JSON and JSON back to YAML in the browser.

→codeJSON TO TYPE

JSON to TypeScript

Generate TypeScript interfaces from JSON samples. Nothing uploaded.

→

Encoding & Security

12 tools

lockBASE64

Base64

Unicode-safe Base64 encode and decode. URL-safe mode. Nothing uploaded.

→imageIMAGE TO BAS

Image to Base64

Convert images to base64 strings.

→photo_libraryBASE64 TO IM

Base64 to Image

Convert base64 strings back to images.

→photo_size_select_largeIMAGE RESIZE

Image Resizer

Resize and compress PNG, JPEG, WebP, or GIF in the browser. Quality slider, before/after size. Nothing uploaded.

→linkURL ENCODER

URL Encoder

Percent-encode with encodeURI or encodeURIComponent. Nothing uploaded.

→verified_userJWT DEBUGGER

JWT Debugger

Decode JWTs, verify HS256 with a local secret, and read exp/iat/nbf. Nothing uploaded.

→securityHASH GENERAT

Hash Generator

SHA-1 to SHA-512 hashes, HMAC, and file checksums in the browser. No MD5, nothing uploaded.

→vpn_keyENCRYPTION D

Encryption-Decryption

Encrypt and decrypt text locally with a key.

→passwordPASSWORD GEN

Password Generator

Strong passwords and passphrases with a strength meter. Nothing uploaded.

→shuffleRANDOM STRIN

Random String

Generate secure random strings for API keys and passwords.

→tagUUID GENERAT

UUID Generator

Generate random UUID v4 strings in bulk. Copy one or all.

→tagUUID V7

UUID v7 Generator

Generate time-ordered UUID v7 identifiers (RFC 9562) in the browser.

→

Time & Numbers

8 tools

scheduleTIMESTAMP

Timestamp

Convert between timestamps and human-readable dates.

→cakeAGE CALCULAT

Age Calculator

Calculate exact age in years, months, and days with a birthday countdown.

→calculateNUMBER BASE

Number Base

Convert numbers between binary, octal, decimal, and hex.

→folderCHMOD CALCUL

Chmod Calculator

Unix permissions: octal, symbolic, setuid/setgid/sticky, and a copyable chmod command.

→format_list_numberedNUMBER TO WO

Number to Words

Convert whole numbers into English words.

→memoryBINARY TRANS

Binary Translator

Convert text to binary code and binary back to text instantly.

→text_fieldsASCII TO TEX

ASCII to Text

Convert ASCII codes to text and back.

→scheduleTIMESTAMP IS

Timestamp to IST

Convert Unix timestamps to Indian Standard Time and back.

→

CSS & Design

10 tools

straightenPX TO REM

px → rem

16px = 1rem. Custom base, bulk convert, and a live table.

→gradientCSS GRADIENT

CSS Gradient

Build linear, radial, and conic gradients with live preview.

→layersBOX SHADOW G

Box Shadow

Build CSS box shadows visually with sliders and copy the generated code.

→border_styleBORDER GENER

Border Generator

Generate CSS borders visually — width, style, color, and radius per side.

→paletteCOLOR HEX

Color Hex

Generate and convert color hex codes.

→paletteHEX TO COLOR

HEX to Colortone

Generate tints and shades from a HEX color.

→contrastCONTRAST CHE

Contrast Checker

Check color contrast ratios against WCAG AA and AAA accessibility standards.

→compressCSS MINIFIER

CSS Minifier

Minify CSS to reduce file size or beautify minified code for readability.

→cssCSS VALIDATO

CSS Validator

Run quick CSS syntax checks.

→drawSVG EDITOR

SVG Editor

Write and preview SVG markup in real time. Insert shapes, load presets, download.

→

Text & Code

12 tools

searchREGEX TESTER

Regex Tester

Match and replace with $1/$<name>/$&, plus a pattern library and flags cheat sheet.

→edit_noteMARKDOWN EDI

Markdown Editor

Live Markdown preview with GFM tables. Copy sanitized HTML. Nothing uploaded.

→compare_arrowsSTRING DIFF

String Diff

Word or character highlight. Compare two texts in the browser.

→text_formatSTRING CASE

String Case

Convert text between different case formats.

→storageSQL FORMATTE

SQL Formatter

Format SQL queries for easier reading.

→codeLUA BEAUTIFI

Lua Beautifier

Beautify Lua code with simple indentation.

→terminalJS RUNNER

JS Runner

Run JavaScript snippets in a secure sandbox — no DevTools needed.

→javascriptJAVASCRIPT V

JavaScript Validator

Check JavaScript syntax without executing code.

→htmlHTML RENDERE

HTML Viewer

View and preview HTML with CSS and JS live in your browser.

→terminalSOURCE CODE

Source Code Viewer

View source code with line numbers.

→data_objectXML VIEWER

XML Viewer

Format and inspect XML markup.

→ruleXML VALIDATO

XML Validator

Validate XML markup in the browser.

→

Generators

6 tools

articleLOREM IPSUM

Lorem Ipsum

Generate placeholder text by paragraphs, sentences, or words.

→phonePHONE NUMBER

Phone Number Generator

Generate random fake US phone numbers in multiple formats for testing.

→emoji_emotionsRANDOM EMOJI

Random Emoji

Generate random emoji in bulk.

→format_quoteINCORRECT QU

Incorrect Quotes

Generate playful dialogue snippets from names.

→devicesUSER AGENT

User Agent Parser

Decode any User-Agent string to browser, engine, OS, and device type instantly.

→scheduleCRON GENERAT

Cron Generator

Build cron expressions visually with presets and a human-readable summary.

→

Browse by category

Every tool runs in your browser. Open a category hub for a shorter list, or stay here for the full catalog.

  • JSON & Data — Format, validate, convert, and transform JSON, CSV, TSV, and XML — all in your browser. (14 tools)
  • Encoding & Security — Base64, URL encoding, JWT debugging, hashing, passwords, and secure random generation. (12 tools)
  • Time & Numbers — Unix timestamps, number bases, chmod permissions, age calculation, and number-to-words conversion. (8 tools)
  • CSS & Design — Gradients, shadows, borders, colors, and unit converters for front-end development. (10 tools)
  • Text & Code — Regex testing, Markdown preview, text comparison, case conversion, SQL formatting, and code validation. (12 tools)
  • Generators — Lorem ipsum, phone numbers, emoji, and other placeholder content for development. (6 tools)
  • Encoding & Decoding — Base64, URL encoding, JWT debugging, image conversion, and resize. (6 tools)
  • Text Processing — String manipulation, case conversion, JSON formatting, and diff. (4 tools)
  • Developer Utilities — Timestamp conversion, color tools, and hashing. (3 tools)