All tools
Browse all free fiokit tools for text, data, code, images, numbers and dates. Search by task or choose a category.
103 tools
Text Editor
Change letter case, reverse text and count words in one interface.
Text toolsCharacter Counter
Count visible characters, letters, numbers and spaces.
Text toolsJSON Formatter
Indent JSON so nested objects and arrays are easier to read.
Data toolsBase64 Encoder & Decoder
Convert text to Base64 and back in one workspace. Choose a direction, swap the result into the input, then copy or download.
Encoding & decodingPassword Generator
Create a random password locally with Web Crypto.
GeneratorsUUID Generator
Generate up to 100 random UUID v4 identifiers.
GeneratorsReading Time Calculator
Estimate reading time using your preferred words per minute.
Text toolsRemove Duplicate Lines
Remove duplicate lines from text and lists while keeping the first occurrence in its original position. Copy or download the cleaned list.
Text toolsRemove Empty Lines
Delete empty lines or keep at most one between paragraphs.
Writing & formattingRemove Line Breaks
Join lines with a space or a custom separator.
Writing & formattingRemove Extra Spaces
Collapse repeated spaces and tidy whitespace around punctuation.
Writing & formattingTrim Text
Remove leading or trailing whitespace from text or individual lines.
Writing & formattingFind and Replace
Find and replace words or phrases in text. Highlight matches, choose case sensitivity and replace one occurrence or all matches.
Text toolsSort Words & Lines Alphabetically
Sort words or lines alphabetically in ascending or descending order. Organize lists with language-aware sorting and optional numeric order.
Text toolsAdd Prefix & Suffix
Add the same prefix and suffix to every line.
Writing & formattingAdd Line Numbers
Number your lines from a chosen starting value.
Writing & formattingText Repeater
Repeat a text with your chosen separator.
Writing & formattingJSON Validator
Check whether your data follows JSON syntax.
Data toolsJSON Minifier
Remove unnecessary whitespace from valid JSON.
Data toolsURL Encoder & Decoder
Convert text to URL and back in one workspace. Choose a direction, swap the result into the input, then copy or download.
Encoding & decodingText & Binary Converter
Convert text to binary and back in one workspace. Choose a direction, swap the result into the input, then copy or download.
Encoding & decodingText & Hex Converter
Convert text to hexadecimal and back in one workspace. Choose a direction, swap the result into the input, then copy or download.
Encoding & decodingSlug Generator
Turn a title into a readable URL slug.
GeneratorsSHA-256 Generator
Calculate a SHA-256 digest of UTF-8 text locally.
Developer toolsSHA-512 Generator
Calculate a 512-bit digest with the Web Crypto API.
Developer toolsUnicode Converter
Convert text to Unicode code points and back.
Social & UnicodeURL Parser
Inspect the components of an HTTP or HTTPS URL without visiting it.
Web & SEOList with Separator
Join lines with commas or your preferred separator.
Numbers & listsSplit Text
Split text into lines using a custom separator. Turn comma-separated values or other delimited text into a list.
Numbers & listsUnix Timestamp Converter
Convert Unix seconds to UTC dates, or ISO dates to seconds.
Date & timeDate Calculator
Count calendar or working days and add or subtract days, weeks, months and years.
Date & timeCode Minify & Unminify
Minify or format JavaScript, CSS, HTML and JSON with adjustable indentation.
Developer toolsAPA 7 Citation Generator
Create APA 7 references for articles, books, websites and book chapters. Format authors, titles and DOI links for your bibliography.
Text toolsText & Image ASCII Art Generator
Turn text into FIGlet banners or convert images into ASCII art. Choose a font, output width and character palette, then copy or download.
Text toolsRemove Letters & Characters
Remove selected letters, symbols or emoji from text. Choose the characters to delete and compare the cleaned result with your original.
Text toolsLorem Ipsum Generator
Generate Lorem Ipsum paragraphs, sentences or an exact word count for website mockups, page layouts and design drafts. Copy or download the text.
Text toolsPlain Text Converter
Convert copied rich text or HTML into plain text. Remove markup, styles and embedded scripts while keeping readable lists and indentation.
Text toolsRoman Numeral Date Converter
Convert dates and numbers to Roman numerals and back. Choose day/month or month/day order and a separator for dates, inscriptions and designs.
Text toolsWord Frequency Counter
Find repeated words and count their frequency in a text. View occurrences and percentages to review repetition and vocabulary distribution.
Text toolsCaesar Cipher & ROTX
Encode or decode a Caesar cipher with a custom alphabet shift. Try ROTX rotations and switch direction without changing tools.
Encoding & decodingcamelCase Converter
Convert phrases, snake_case, kebab-case and PascalCase into camelCase identifiers with automatic word boundary detection.
Encoding & decodingPascalCase Converter
Turn phrases and existing identifiers into PascalCase. Normalize camelCase, snake_case and kebab-case for classes, types and components.
Encoding & decodingMD5 Hash Generator
Calculate the MD5 digest of UTF-8 text and copy its 32-character hexadecimal checksum for comparisons and legacy workflows.
Encoding & decodingMorse Translator & Audio
Translate text into Morse code and decode dots and dashes. Listen to Morse tones with adjustable speed, pitch and volume.
Encoding & decodingNumber Sorter
Sort numbers from smallest to largest or largest to smallest. Order negative values, decimals and scientific notation without alphabetical sorting.
Encoding & decodingROT13 Encoder & Decoder
Apply ROT13 to encode or decode Latin text. Rotate letters by 13 positions and restore the original message with the same operation.
Encoding & decodingQR Code Generator
Create QR codes for links, text, Wi-Fi, email, WhatsApp and Telegram. Customize colors and center icons, then download PNG or vector SVG.
GeneratorsCSS Unit Converter
Convert px, em, rem, pt, percentages and viewport units. Set font sizes and reference dimensions for accurate CSS length calculations.
Developer toolsVisual Regex Builder & Tester
Build regular expressions with visual rules, repetition controls and presets. Test matches and capture groups before copying your JavaScript regex.
Developer toolsSCSS Formatter
Format SCSS with consistent indentation and readable nested selectors. Clean up variables, mixins and stylesheet blocks without compiling them.
Developer toolsColor Converter: HEX, RGB, HSL & CMYK
Convert colors between HEX, RGB, RGBA, HSL and CMYK. Preview the shade and copy color values for web design and graphic layouts.
GraphicsRandom Generator
Generate random numbers, words, dates, letters, colors and usernames. Choose quantities and control repeated results.
RandomRandom List Picker
Randomly select entries from a list, CSV or Excel XLSX. Choose a sheet, column or whole rows and draw with or without replacement.
RandomSocial Text Fonts
Create copyable Unicode text styles for social posts: bold, italic, script, gothic, circled and monospace lettering.
Social & UnicodeJSON Tree Viewer
Explore JSON objects and arrays in an expandable tree, validate structure and copy formatted JSON.
Data toolsCSV and JSON Converter
Convert CSV tables to JSON records and JSON object arrays to CSV. Select comma, semicolon or tab separators.
Data toolsCSV Viewer and Column Extractor
View a CSV table, normalize quoted fields or extract a numbered column into a line-separated list.
Data toolsXML and JSON Converter
Convert XML elements and attributes to JSON or build an XML document from JSON with a root element.
Data toolsXML Formatter and Validator
Format, compact and validate XML syntax with one tool. Inspect readable output without executing the document.
Data toolsMarkdown and HTML Converter
Preview Markdown safely, export clean HTML or convert basic HTML into Markdown for writing and documentation.
Developer toolsSQL Formatter
Format SQL queries for MySQL, PostgreSQL, SQLite and SQL Server with readable indentation.
Developer toolsCompare Lists
Find shared entries, differences and unique combinations between two lists with set operations.
Numbers & listsNumber Base Converter
Convert integers between binary, decimal, hexadecimal and any base from 2 to 36 without floating-point rounding.
Encoding & decodingHTML Entity Converter
Encode HTML special characters or decode named and numeric HTML entities into plain text in one interface.
Encoding & decodingWhatsApp Text Formatter
Prepare bold, italic, strikethrough or monospace message syntax and copy it into WhatsApp.
Social & UnicodeKeyword Frequency and Density
Measure repetitions and percentages for single words and two- or three-word phrases in your text.
Web & SEOUTM Link Builder
Build campaign URLs with source, medium, campaign, term and content parameters, correctly encoded.
Web & SEOFile Hash Checker
Calculate SHA-256, SHA-512 or SHA-1 file checksums locally to compare downloads and detect byte-level changes.
Developer toolsSymbols and Emoji
Find and copy common emoji, arrows, mathematical symbols and decorative characters by category or Unicode code.
Social & UnicodeImage and Base64 Converter
Convert raster images to Base64 data URLs or decode image Base64 into downloadable PNG files, with size and format validation.
Encoding & decodingUnicode Escape Converter
Encode text as Unicode escapes and decode UTF-16 or code point escape sequences, including emoji and accented letters.
Encoding & decodingInvisible Character Inspector
Find hidden Unicode spaces and marks, remove them from text or copy a selected invisible character.
Social & UnicodePercentage Calculator
Calculate a percentage of a value, percentage ratios, increases, reductions and percentage changes.
Numbers & listsISO Week Calculator
Find the ISO week number, week-year and weekday for a calendar date, including year-boundary weeks.
Date & timeMeta Tag Builder
Prepare HTML title, description, robots and canonical tags from plain text with safe attribute escaping.
Web & SEOText Difference Checker
Compare two texts and highlight added and removed words or lines side by side.
Text toolsExtract Emails, Links and Numbers
Extract email addresses, web links, phone numbers or custom pattern matches from text.
Text toolsSubtitle Editor and SRT VTT Converter
Convert SRT and WebVTT subtitles, edit cues and shift timestamps to synchronize captions.
Text toolsVisual Table Generator
Create editable tables and export Markdown, HTML or spreadsheet-safe CSV.
Data toolsYAML and JSON Converter
Convert YAML to JSON and JSON to YAML with syntax validation and readable indentation.
Data toolsStructural JSON Comparison
Compare JSON objects by structure and locate added, removed or changed values by path.
Data toolsMerge CSV and Excel Files
Combine spreadsheet rows or join two tables by a shared column, then download the resulting CSV.
Data toolsJWT Token Reader
Decode JWT headers and payloads and inspect expiry dates without sending the token anywhere.
Encoding & decodingBarcode Generator
Generate EAN-13, EAN-8, UPC-A and Code 128 barcodes and download sharp SVG or PNG images.
GeneratorsCalendar Event ICS Generator
Create downloadable calendar events with time zones, location, description and recurrence.
GeneratorsCron Schedule Builder
Build five-field cron expressions with presets and preview the next runs in your chosen time zone.
Developer toolscURL to Fetch and Python
Convert a cURL request into editable HTTP fields and generate JavaScript Fetch or Python Requests code.
Developer toolsCSS Grid and Flexbox Builder
Design responsive Grid and Flexbox layouts with a live preview and copy-ready CSS.
Developer toolsJSON to TypeScript Types
Generate TypeScript types from JSON, including nested objects, arrays and optional properties.
Developer toolsImage Editor
Resize, crop and rotate images online, with aspect ratio controls and PNG downloads.
GraphicsWCAG AA and AAA Contrast Checker
Check color contrast for WCAG 2.2 AA and AAA, preview text sizes and find accessible color alternatives.
GraphicsColor Palette Generator
Build harmonious color palettes or extract dominant colors from an image and export CSS variables.
GraphicsFavicon and App Icons Generator
Turn an image into favicon ICO, PNG and app icon sizes with a downloadable site icon package.
GraphicsJSON-LD Structured Data Generator
Create JSON-LD for articles, products, organizations and breadcrumbs using editable fields.
Web & SEOSitemap XML Generator and Validator
Generate an XML sitemap from a URL list or check sitemap structure, invalid URLs and duplicates.
Web & SEOUnit Converter
Convert length, area, volume, mass, temperature, speed and digital storage units.
Numbers & listsStatistics Calculator
Calculate mean, median, modes, percentiles, variance and standard deviation from a numeric list.
Numbers & listsTime Zone Meeting Planner
Compare local times across cities and find shared working hours while accounting for daylight saving time.
Date & timeHours and Duration Calculator
Add work intervals, subtract breaks and convert decimal hours to hours and minutes.
Date & timeRandom Team Generator
Split a list into balanced random teams, optionally distributing participants by skill level.
RandomImage Format Converter
Convert images between PNG, JPEG and WebP online. Choose an output format and keep the original pixel dimensions.
GraphicsImage Compressor
Reduce image file size with automatic quality checks. Download WebP by default, or choose PNG or JPEG and compare the result.
GraphicsTime Zone Converter
Convert dates and times between CT, GMT, UTC and world cities. Add or subtract hours and minutes with daylight saving time support.
Date & time