Free online tools for every list task

Compare two lists online to find common items, items only in list A, and items only in list B. Case-sensitive and case-insensitive comparison supported.

Find values that appear in List A but not List B with this free online list difference tool. Compare IDs, keywords, URLs, names, and spreadsheet columns.

Find the intersection of two lists: values present in both lists. Compare keywords, emails, IDs, URLs, and spreadsheet columns privately online.

Pretty-print and compare two HTML snippets to highlight source, attribute, and content changes with less whitespace noise.

Remove duplicate lines from a list while preserving the original order. Ignore case, trim whitespace, and clean empty lines instantly in your browser.

Sort lines alphabetically, naturally, or numerically in ascending or descending order. Clean blank lines and organize lists online.

Filter lines online by text, prefix, suffix, exact value, or regular expression. Keep matching lines or remove them while preserving the original order.

Remove blank and whitespace-only lines from text online, or collapse repeated blank rows into a single separator while preserving the remaining text.

Find and replace text online across multiple lines. Use literal text, whole-word matching, case sensitivity, or regular expressions with live result counts.

Remove repeated words from text while preserving their first occurrence and punctuation. Process duplicates across the document or separately within each line.

Convert HTML into readable plain text while decoding entities and preserving useful line breaks for block elements.

Normalize visually equivalent Unicode sequences using NFC, NFD, NFKC, or NFKD and diagnose hidden comparison differences.

Find zero-width spaces, byte-order marks, soft hyphens, directional marks, and control characters hidden in text.

Extract HTTP, HTTPS, and www links from text online. Remove duplicates, strip tracking query parameters, and copy a clean URL list privately.

Extract email addresses from text, documents, logs, HTML, or copied data. Validate, lowercase, deduplicate, and export a clean email list locally.

Extract integers, decimals, signed numbers, or all numeric values from text online. Remove duplicates, preserve order, and export one number per line.

Extract one column from CSV, TSV, semicolon, or pipe-delimited data online. Select by header name or column number with quoted-field support.

Run a JavaScript regular expression against text and extract full matches or a selected capture group with unique-result options.

Convert a column or newline-separated list into comma-separated values. Add quotes, choose a custom delimiter, and copy the result online.

Add text before or after every line in a list. Wrap values in quotes, build URLs, format SQL values, and edit columns in bulk online.

Convert titles and phrases into clean URL slugs in bulk. Remove accents, punctuation, extra spaces, and uppercase letters online.

Convert newline-separated values into a valid JSON string array. Escape quotes correctly, remove empty rows, and choose compact or pretty output.

Change every line in a list to uppercase, lowercase, title case, or sentence case. Format keywords, labels, names, and copied columns online.

Convert a newline-separated list into JSON, JavaScript, Python, PHP, or Java array syntax. Escape strings correctly and choose compact or formatted output.

Number every non-empty line online with a custom starting value, increment, zero padding, prefix, and separator. Copy clean numbered text instantly.

Convert comma-separated, semicolon-separated, pipe-separated, tab-separated, or custom-delimited values into one clean item per line online.

Combine seed keywords, modifiers, locations, and buyer-intent terms into broad, phrase, or exact-match keyword lists. Free, fast, and processed in your browser.

Generate ordered permutations from a list with a chosen length. Create arrangements with or without repetition and export the results online.

Merge two lists by appending, alternating rows, joining line by line, or creating a unique union. Preserve order and export the merged results online.

Count repeated words, percentages, and first appearances. Ignore case, punctuation, numbers, and common stop words.

Count letters, digits, symbols, whitespace, and Unicode characters with code-point details and percentages.

Calculate detailed text statistics including words, unique words, sentences, paragraphs, lines, characters, and estimated reading time.

Compare two JSON documents by keys and values instead of line order. Find added, removed, and changed paths in your browser.

Validate JSON online and locate syntax errors with line and column details. Format valid JSON without uploading your data.

Beautify minified JSON with readable indentation and stable formatting. Validate and format JSON locally in your browser.

Remove unnecessary whitespace from JSON while validating the document. Create compact JSON privately in your browser.

Merge two JSON objects with recursive object handling and clear overwrite behavior. Process configuration data in your browser.

Flatten nested JSON objects and arrays into dot-notation paths. Inspect configuration, translation, and API data online.

Compare two nested localization JSON files to find missing keys, extra keys, and empty translations. Built for i18n QA.

Compare CSV data by ID, email, SKU, or another key. Find added, removed, and changed rows even when row order differs.

Deduplicate CSV records by one or more columns while preserving headers and the first matching row. Runs locally in your browser.

Sort CSV records by a selected column in ascending or descending order while preserving quoted values and headers.

Filter CSV rows using contains, equals, starts-with, ends-with, or regular-expression matching on a selected column.

Convert CSV rows into a JSON array of objects using the first row as property names. Handles quoted delimiters locally.

Convert a JSON array of objects into CSV with a combined header set and correctly escaped values.

Compare two contract drafts and highlight inserted, removed, and changed wording by paragraph and word. Private browser-based redline.

Check source and translated text for missing variables, HTML tags, numbers, URLs, and line mismatches before localization release.

Shuffle a list into a random order instantly. Randomize names, tasks, questions, teams, or rows privately in your browser.

Create random pairs from a list of names or match two separate lists without repeats. Useful for classrooms, teams, games, and peer reviews.

Pick one or multiple random items from a list online. Choose whether items can repeat and generate a fresh unbiased selection in your browser.

Split a list of names into random groups or teams online. Choose the number of groups or members per group and handle leftovers automatically.