Developer & text tools
Format JSON, decode a token, hash a string, or clean up text without pasting anything into someone else's server. These developer tools run locally in your browser, which matters when the data is a real payload.
- Nothing you type leaves this page
- Works offline once loaded
- Free forever, no signup
- Word Counter Count words, characters, sentences and reading time as you type. Free, instant, and the text nev...
- Case Converter Convert text between UPPER CASE, lower case, Sentence case, Title Case, camelCase, snake_case an...
- Password Generator Generate strong random passwords and memorable passphrases in your browser. Nothing is transmitt...
- JSON Formatter Format, validate and minify JSON in your browser. Errors are reported with line and column. Noth...
- Text Diff Checker Compare two pieces of text side by side with added, removed and changed lines highlighted. Free,...
- Remove Duplicate Lines Remove duplicate lines from any list, with options to keep the first or last copy, ignore case,...
- Lorem Ipsum Generator Generate lorem ipsum placeholder text as paragraphs, sentences or words, with an option to start...
- Random Number Generator Generate random whole numbers in any range, with quantity, duplicate and sorting controls, using...
- Percentage Calculator Calculate X% of Y, what percent X is of Y, or the percentage increase or decrease between two nu...
- Unit Converter Convert length, weight, temperature, area and volume between common units instantly. Free, priva...
- Base64 Encode/Decode Encode text or files to Base64 and decode Base64 back to text, entirely in your browser. UTF-8 s...
- UUID Generator Generate RFC 9562 UUID v4 identifiers in your browser using cryptographic randomness. Generate o...
- Hash Generator Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text in your browser using the Web Cr...
- Slug Generator Turn any title into a clean, SEO-friendly URL slug. Strips accents and symbols, choose a hyphen...
- URL Encoder/Decoder Percent-encode or decode text and URLs in your browser, plus a query-string parameter table view...
- JWT Decoder Decode a JWT header and payload instantly, with human-readable exp/iat/nbf dates and an expiry s...
- JSON Validator Validate JSON and get the exact line and column of the first syntax error. Free, in-browser — no...
- JSON Minifier Strip every unnecessary byte from a JSON payload — whitespace, indentation, line breaks — withou...
- SHA-256 Hash Generator Generate the SHA-256 hash of any text instantly in your browser using the Web Crypto API. Compar...
- Title Case Converter Convert any heading, blog title or book name into proper Title Case — small words like "of" and...
- Uppercase to Lowercase Converter Turn ALL CAPS text back into normal lowercase text in one click. Free, instant, no retyping — pa...
- Character Counter Count characters, with and without spaces, live as you type. Free character counter for meta des...
- Instagram Character Counter Check your Instagram caption against the 2,200-character limit and your bio against 150, live as...
- Twitter (X) Character Counter Check your post against X's 280-character limit live as you type. Free X (Twitter) character cou...
- Reading Time Calculator Estimate how long an article, speech or blog post takes to read out loud. Free reading time calc...
- Passphrase Generator Generate a strong, memorable passphrase of random words — the diceware method — entirely in your...
- Text Compare Compare two pieces of text and see exactly what changed — added, removed and edited lines highli...
- URL Encoder Percent-encode text, spaces and special characters for safe use in a URL or query string. Free,...
- URL Decoder Decode a percent-encoded URL or query string back into readable text, with a friendly error if t...
- Base64 Encode Encode text or files to Base64 in your browser — instant, free, no upload. URL-safe option, data...
- Base64 Decode Decode a Base64 string back to readable text or binary, entirely in your browser. Auto-fixes pad...
- GUID Generator Generate GUIDs — Microsoft's name for the same 128-bit UUID format — using cryptographic randomn...
- Epoch Converter Convert epoch/Unix timestamps to human dates and back, in IST, UTC or any timezone — seconds or...
- Timestamp to Date Converter Convert a Unix timestamp to a readable date and time, in your local timezone or any other. Free,...
- Crontab Generator Build a standard 5-field Unix crontab schedule visually, see it explained in plain English, and...
- Cron Expression Generator Build a 6 or 7-field Quartz/Spring cron expression with seconds resolution, get a plain-English...
- Regex Tester Test regular expressions with live match highlighting, capture groups and a recipe library (emai...
- Password Strength Checker Check how strong a password actually is — entropy, pattern detection and estimated crack time. N...
- Random Name Picker Paste names, spin the wheel, and let a fair random draw choose one — for classrooms, raffles or...
- Wheel Spinner Spin a colourful wheel to make any random choice — yes or no, dinner tonight, who decides next....
- Instagram Giveaway Winner Picker Paste your Instagram comments and pick a fair giveaway winner from the @handles automatically. F...
- Text to Handwriting Converter Turn typed text into handwritten-looking notes on ruled paper — pick ink colour and paper style,...
- Fancy Text Generator Type once and get 20+ Unicode text styles to copy and paste — bold, script, bubble, strikethroug...
- Instagram Fonts Generator Generate stylish fonts for your Instagram bio and captions — bold, script, small caps, bubble an...
- Cursive Text Generator Turn typed text into cursive-style Unicode script, bold script and italic fonts you can copy and...
- CSV to Excel Converter Convert CSV to a real .xlsx in your browser — no upload, no watermark. Preview the table, fix de...
- Excel to CSV Converter Convert .xlsx or .xls to CSV in your browser, one sheet at a time or all of them. UTF-8 BOM by d...
- JSON to Excel Converter Convert a JSON array of objects to a real .xlsx in your browser. Nested objects flatten to dotte...
- Excel to JSON Converter Convert .xlsx or .xls to a JSON array of objects in your browser, with a header-row toggle and m...
- JSON to CSV Converter Convert a JSON array of objects to CSV in your browser. Nested objects flatten to dotted columns...
- CSV to JSON Converter Convert CSV to a JSON array of objects in your browser. Auto-detects delimiter and encoding, pre...
- Remove Duplicate Rows Remove duplicate rows from a CSV or Excel file by all columns or one key column. Free, in-browse...
Bookmark this page — the tool keeps working offline, and your settings stay in this browser. Built by Dynamb Technologies, who make software for a living.