Developer Utilities

Paste or drop a CSV and instantly get structured JSON. Smart numeric coercion, pretty-print, and copy/download.

Convert any JSON array of objects into a clean CSV. Flattens nested keys with dotted notation, escapes commas/quotes per RFC 4180, and offers a customizable delimiter + UTF-8 BOM toggle for Excel compatibility.

Pretty-print messy or minified JSON with adjustable indent (2 / 4 spaces or tabs) and an optional 'sort keys alphabetically' mode. Copy or download the result, all in your browser.

Validate JSON against the RFC 8259 spec and see exactly where errors occur — line, column and a human-readable explanation — instead of the generic 'Unexpected token' message you'd get from a native parser.

Remove indentation and whitespace from JSON to produce a single-line compact payload. See the exact byte savings and copy / download the result instantly.

Visualize any JSON document as a virtualized, collapsible tree with type-based color coding, search, expandable paths, and copy-on-click. Stays responsive for very large payloads.

Diff two JSON documents and highlight exactly which keys were added, removed, or changed — side-by-side or in a unified inline view. Structural only, so re-ordered keys are not flagged.

Convert JSON into equivalent YAML 1.2 syntax for Kubernetes manifests, Docker Compose, or any config that prefers YAML. Configurable indent and flow style; runs entirely in your browser.

Paste any JSON object or array and get ready-to-use TypeScript interfaces/types. Recursive type inference with deduplication, PascalCase or camelCase naming, and interface/type alias toggle.

Generate valid JSON Schema (draft 2020-12 / 2019-09 / draft-07) from your JSON data. Infers types, detects string formats, and identifies optional vs required fields across multiple samples.

Check whether a JSON document conforms to a JSON Schema (draft-07 / 2019-09 / 2020-12) and see exactly which rules failed, with JSON Pointer paths for each violation.

Compare two JSON documents and produce a standards-compliant JSON Patch (add/remove/replace operations). Built on the same structural diff engine as JSON Diff.

Combine 2+ JSON documents using a recursive deep-merge with three array strategies (replace, concatenate, merge-by-index). Label your sources and see which keys conflicted.

Test JSONPath expressions in real-time against sample JSON. Shows match count and results. Uses jsonpath-plus for standards-compliant JSONPath syntax.

Produce arrays of realistic mock JSON objects — names, emails, addresses, prices, UUIDs, and more — based on a customizable field template. Seeded random for reproducible output.

Flatten deeply nested JSON objects into dot-notation key-value pairs, or unflatten them back. Configurable delimiter and array handling.

Search keys and values in any JSON document with case-sensitive/insensitive toggle. Finds matches in keys, string values, numbers, booleans, and nulls.

Extract all unique key paths from a JSON document, or pull all values for a specific key across an array of objects. Two modes with copy support.

Sort every object's keys in a JSON document — ascending (A→Z) or descending (Z→A). Uses your existing JSON parser for error feedback.

Escape a raw string for embedding in JSON (e.g. newlines become \n), or unescape an escaped JSON string back to plain text.

Scan JSON text for duplicate keys — which are syntactically valid but often indicate a copy-paste or merge error. Unlike JSON.parse (which keeps the last value), we flag every duplicate.

Parse YAML text and produce equivalent JSON using the js-yaml library. Works with any valid YAML 1.2 document.

Transform JSON documents into well-formed XML. Arrays become repeated elements; nested objects become nested elements.

Convert well-formed XML into equivalent JSON objects. Repeated child elements become arrays; attributes are prefixed with @.

Analyze which keys and branches contribute the most bytes to your JSON. Each path shows absolute size, percentage, and a proportional bar.

Convert a JSON array of objects into SQL table definitions and INSERT statements. Type inference, table naming, and optional DROP TABLE prefix.

Turn a JSON array of objects into a ready-to-use Markdown table for docs, READMEs, and wikis. Headers from keys, pipes in the right places.

Upload JPG/PNG images and get a single PDF. Each image becomes one page, sized to the original pixels.

Combine 2 or more PDFs into a single document, in your chosen order. Preserves original pages exactly.

Drag, swap, and organize PDF pages. Download the rearranged PDF in seconds.

Pick any page from a PDF and download it as its own file. No upload required.

Convert the first page of a PDF to a PNG download. Useful for thumbnails and previews.

Rotate the orientation of every page in a PDF, then download the result.

Encrypt a PDF with a user password and owner password.

Stamp text onto the first page of a PDF.

Reduce JPG/PNG/WebP file size with a live quality slider and before/after comparison.

Convert images between JPG, PNG, WebP, and BMP with quality control.

Resize images by pixel dimensions with aspect-ratio lock and social media presets.

Remove backgrounds automatically using on-device AI. The MediaPipe segmentation model detects people and removes the background — no server upload.

Interactive crop tool with draggable selection box and locked aspect ratios.

Encode images as Base64 data URIs with ready-to-use HTML/CSS snippets, plus reverse decode mode.

Add text or logo watermarks with control over position, opacity, size, and color.

Click anywhere on an image to read the pixel color as HEX/RGB/HSL, plus extract dominant palette.

View hidden EXIF metadata in your photos and download a clean copy with all data stripped.

Combine multiple images into a single PDF with page size control and reorderable pages.

Convert iPhone HEIC photos to JPG format directly in your browser — no uploads, no software.

Strip unnecessary metadata, comments, and whitespace from SVG files to reduce file size.

Rotate images by 90°/180°/270° or flip horizontally/vertically with live preview.

Generate favicon PNGs at 16×16, 32×32, 48×48, up to 512×512 from a single source image.

Combine 2+ images into a grid collage with adjustable spacing, background color, and layout.

Upload a sequence of PNG frames, preview the animation, and download individual frames.

Scale images up to 4× using high-quality smoothing — great for enlarging small images.

Adjust brightness/contrast/saturation and apply filters like grayscale, sepia, vintage, cool, and warm.

Compare two images and see exactly which pixels differ, with adjustable sensitivity threshold.

Generate QR codes from any text or URL with customizable size, foreground/background colors.

Frame your screenshots with device bars, padding, shadows, and gradient backgrounds.

Upload an image and extract text. Full Tesseract.js offline OCR integration is planned.

Pack multiple images into a single sprite sheet with auto-generated CSS class definitions.

Convert PDF pages to PNG images using pdf.js — each page becomes a separate downloadable image.

Paint over image regions to blur or pixelate them — perfect for redacting sensitive info.

Analyze arrays of objects and get per-field stats: min, max, avg, unique count, null count, top values, and type inference.

Detect and report circular references in JSON data that would cause JSON.stringify to throw a TypeError.

Transform an array of objects into a key-indexed object (like Lodash keyBy) or go the other direction — object back to array.

Remove // and /* */ comments plus trailing commas from JSONC/JSON5 files to produce strict RFC 8259 JSON.

Interactive grid for viewing, sorting, searching, and editing CSV files. Editable cells, column sorting, and live search.

Normalize CSV formatting: choose delimiter, quote style, add remove BOM, and trim cells.

Validate CSV files for ragged rows, duplicate headers, empty rows, encoding issues, and more.

Merge 2+ CSV files by stacking rows and aligning columns by header name. Add a source file column to track provenance.

Remove duplicate rows from CSV — by full row match or by specific key columns. Choose keep first or last occurrence.

Transform CSV rows into GitHub-flavored Markdown table syntax with proper pipe alignment and escaping.

Convert CSV to TSV or TSV to CSV with proper quoting and escaping.

Compute per-column stats: count, unique count, null/empty count, and numeric columns get min, max, avg.

Sort CSV rows by any column, ascending or descending, with auto/numeric/alphabetical type detection.

Convert CSV to SQL with CREATE TABLE, INSERT statements, and multiple dialect support (MySQL, PostgreSQL, SQLite, ANSI).

Divide a CSV into multiple smaller files — by row count per chunk or by unique values in a chosen column.

Analyze CSV text to automatically determine the delimiter in use — comma, semicolon, tab, or pipe.

Row-aware CSV comparison matched by a key column. Shows added, removed, changed, and unchanged rows with cell-level detail.

Detect types for every CSV column: number, boolean, date, string, or empty. See sample values for each column.

Filter CSV rows by one or more conditions (equals, contains, greater than, etc.) combined with AND/OR logic.

Fix garbled characters, mojibake, and BOM issues in CSV files. Add or remove UTF-8 BOM for Excel compatibility.

Format messy or minified YAML into clean, consistently indented output. Comments are preserved.

Paste your YAML and instantly see if it's valid. Invalid YAML shows a clear error message from js-yaml's parser.

Diff two YAML configs side-by-side or unified. Ignores formatting noise — only real semantic changes are flagged.

Parse YAML text and produce equivalent JSON using the js-yaml library. Works with any valid YAML 1.2 document.

Convert JSON into equivalent YAML 1.2 syntax for Kubernetes manifests, Docker Compose, or any config that prefers YAML. Configurable indent and flow style; runs entirely in your browser.

Paste a JSON object and get a GraphQL schema with inferred types — nullable or required.

A lightweight JSON viewer with a synchronized line-number gutter. Paste JSON and see every line numbered.

Generate chat-ready JSON snippets — auto-split into multiple messages to fit platform character limits.

Transform CSV data into well-formed XML. Customize root and row tag names, with pretty-print option.

Convert CSV into a clean HTML table. Preview the rendered output and copy or download the HTML.

Flip a CSV — rows become columns and columns become rows. Optionally add row index labels.

Pick and choose columns from a CSV. Click to select — only the columns you want end up in the output.

Live word, character (with/without spaces), sentence and paragraph counts, plus estimated reading and speaking time and a keyword-density breakdown. Runs entirely in your browser.

Instantly convert text between 11 casing conventions — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, alternating and inverse. Smart Title Case correctly handles minor words.

Remove exact-duplicate lines keeping the first occurrence — with case-sensitive/insensitive comparison, whitespace trimming, blank-line filtering and optional sorting. See exactly which lines were removed.

Side-by-side or unified diff of two text inputs at line or word granularity, powered by a Myers-style diff algorithm. Additions, removals and changes are highlighted with +/− markers and strikethrough — never by color alone.

Search a pasted document for a term or pattern and replace all or the next match — with case-sensitive, whole-word and regex modes. Capture groups ($1) work in regex replacements, and the match count updates live.

Parse CommonMark (plus tables and strikethrough) into standards-compliant HTML with a live preview, powered by the `marked` parser. Sanitization of embedded raw HTML is on by default.

One unified tool for Base64 (UTF-8 safe), URL/percent encoding and HTML entity encoding — with an encode/decode toggle per scheme and clear inline errors for malformed input.

Sort pasted lines alphabetically (A–Z / Z–A), numerically, by length, in natural order or randomly — with case-sensitivity and optional duplicate removal in the same pass.

Convert titles or any text into lowercase, URL-safe slugs — transliterating accented characters (café → cafe), stripping punctuation, with configurable separator and word-boundary max-length truncation.

Generate classic Lorem Ipsum placeholder text by word, sentence or paragraph count — with the traditional 'Lorem ipsum dolor sit amet…' opening (toggleable), reproducible seeded output, and copy/download.

Reverse text instantly — the whole string, the word order, each word's letters, or the line order. Live result with copy/download.

Clean up messy pasted text — trim every line, collapse multiple spaces into one, or remove all whitespace and line breaks entirely.

Count total, non-empty and blank lines, see your longest line, and add sequential line numbers to pasted text.

Convert HTML markup into clean, readable plain text — tags stripped, entities decoded, block elements become line breaks.

Generate strong random passwords with configurable length and character-set rules, using cryptographically secure randomness. Copy one or download the batch.