How does it handle differences in nested objects?

Nested differences are identified and shown at the specific path where they occur, not just flagged as "the objects differ."

Does array order matter in the comparison?

Yes, by default arrays are compared by position — a reordered array with the same elements may show as changed depending on how strictly the comparison is configured.

Can I see exactly which values changed, not just that something changed?

Yes, the diff shows the specific old and new values for each changed field, not just a general "modified" flag.

Does JSON Diff upload my files to a server?

No. JSON Diff runs entirely in your browser using on-device processing, your files never leave your device.

JSON Diff

Compare two JSON documents and highlight what changed.

Runs in your browser

Left JSON

Right JSON

About this tool

Comparing two versions of a JSON document by eye — spotting exactly which fields were added, removed or changed — is slow and error-prone once the document has any real depth or nesting. This tool compares two JSON documents and highlights exactly what changed, turning a manual comparison into an instant, reliable diff.

Frequently asked questions

Hot

JSON Formatter

Format, validate and minify JSON.

Text Diff Checker

Compare two blocks of text and highlight the differences.

File Converter

Convert data files between CSV, JSON and TSV.

Base64 Converter

Encode or decode text and files as Base64.

Base32 Encoder/Decoder

Encode or decode text as Base32.

ULID Generator

Generate sortable, timestamp-based ULIDs.

Semver Parser/Comparator

Parse and compare two semantic version numbers.

.env File Parser/Validator

Parse a .env file and flag duplicate keys, missing values and invalid names.

Markdown Table Generator

Build a Markdown table with a spreadsheet-style editor.

CSS Grid Generator

Visually build a CSS Grid layout and copy the code.

CSS Flexbox Generator

Visually build a CSS Flexbox layout and copy the code.

Color Blindness Simulator

Preview an image as seen with different types of color blindness.

PDF Tools

Merge, split, compress and convert PDF files.

Image Tools

Compress, resize, crop and convert images.

Link & QR Tools

Shorten links and generate QR codes and barcodes.

Audio Tools

Convert audio files and turn text into speech, or speech into text.

Video Tools

Compress and process video files, right in your browser.

SEO & Web Tools

Meta tags, sitemaps, schema markup and other on-page SEO utilities.

Data & Spreadsheet Tools

Clean, convert and inspect CSV, TSV and tabular data.

File Tools

Archive, inspect and convert files, right in your browser.

Business Tools

Invoices, quotations, receipts and other business documents.

Social Media Tools

Resize images for social platforms, count hashtags and preview posts.