Find the right tool for the job.

Measure character, word, line, and byte counts in real time.

Highlight differences between two texts line by line or character by character, side by side or unified.

Reveal invisible characters such as special spaces, line breaks, and zero-width characters, and inspect code points and normalization.

Unify full-width/half-width characters and symbols, and find and remove invisible and platform-dependent characters.

Preview Markdown in real time and convert or export it to HTML.

Test regular expressions in real time and extract matches.

Convert between HEX, RGB, HSL, HSV, and CMYK, and check WCAG contrast ratios.

Convert images to JPEG, PNG, or WebP and compress them by adjusting quality and size.

Annotate screenshots with mosaic, arrows, and text, then crop, add padding, or merge them.

Extract Japanese and English text from images and screenshots, including vertical Japanese.

Convert videos to animated GIFs, or compress them to MP4 or WebM to reduce file size.

Automatically cut out the subject of an image and make the background transparent, a solid color, blurred, or another image.

Inspect EXIF and GPS location data in photos, then download clean copies with it removed.

Optimize SVGs, see how much smaller they get, and convert them to PNG at any size.

Generate an ICO, PNGs in every size, an apple-touch-icon, and manifest.json icons from a single image.

Compare two images with a slider, an overlay, or a pixel diff to spot visual changes.

Merge PDFs, split by page ranges, and extract, reorder, or rotate pages — all in your browser.

Create invoices, estimates, delivery notes, and receipts that meet Japan's qualified invoice requirements, and save them as PDF.

Format or minify JSON, and generate TypeScript type definitions from it.

Convert between YAML, TOML, and JSON, with line and column shown for syntax errors.

Convert between CSV and JSON with a table preview.

View a CSV as a table and add, remove, and edit rows, columns, and cells, then save.

Convert sheets in Excel or ODS files to CSV or JSON, with Shift_JIS output and a ZIP of every sheet.

Run JSONPath queries against JSON and see matching values and paths in real time.

Compare two JSON documents regardless of key order or formatting, and list additions, removals, and changes by path.

Validate JSON against a JSON Schema (Draft 2020-12) and list type, required, and value-constraint violations by path.

Extract types and properties from sample JSON and generate a starting JSON Schema (Draft 2020-12).

Compare source and translation JSON to list missing or extra keys and missing or added {name} placeholders by key path.

Match two CSV files by a key column and extract added, removed, and updated rows along with the changed cells.

Encode or decode text as Base64.

Encode/decode URLs and break down and edit query parameters.

Create QR codes from text or URLs, and read QR codes from image files.

Analyze a HAR file and automatically diagnose errors, speed, security, and resources.

Convert cURL commands into HTTP request code for JavaScript (fetch, axios), Python, C#, and Go.

Compare two OpenAPI definitions and find changes that break existing clients, such as removed endpoints or newly required fields.

Check whether each URL may be crawled for a user agent, with the group, rule, and line number that applied.

Calculate the network address, subnet mask, range, and address counts from CIDR notation, and check whether IPs are in range.

Compute 17 hashes including MD5, SHA-1/2, SHA-3, BLAKE2/3, and CRC32, and compare against an expected value.

Generate password hashes with Argon2id, bcrypt, scrypt, or PBKDF2, and verify existing hashes.

Break a JWT down into Header, Payload, and Signature, and check its expiry.

Decode PEM certificates to see issuer, subject, expiry, SANs, and fingerprints, and check whether they've expired.

Bulk-generate UUID v4/v7 and ULIDs, and create passwords with custom length and character sets.

Mask cookies, auth headers, tokens, email addresses, and IP addresses in logs and HAR files.

Set owner, group, and others permissions with checkboxes and convert between octal such as 755 and rwxr-xr-x.

Convert between Unix timestamps and dates, and see the time in multiple time zones at once.

Explain cron expressions in plain language and list upcoming run times.

Compare two .env files and list missing, duplicate, and empty keys. Values are hidden by default.

Output the structure of a folder or archive (ZIP, TAR) as text, like the tree command.

Check whether each path is ignored by a .gitignore, with the rule and line number responsible.

Check which candidate versions satisfy an npm-style range such as ^1.2.0 or ~1.4.

Automatically indent-format messy SQL, adjusting for dialect and keyword case.

Generate PostgreSQL INSERT statements from CSV or JSON data, with clear handling of escaping and NULL.

Show EXPLAIN (ANALYZE, FORMAT JSON) output as a tree and highlight slow nodes and row misestimates.

Format or minify HTML, CSS (SCSS, Less), JavaScript, and TypeScript.

Use a source map to map minified JavaScript error locations back to the original source file, line, and column.

Convert CREATE TABLE statements into schema.prisma models, enums, and relations.

Write flowcharts, sequence diagrams, and ER diagrams in Mermaid syntax with a live preview, and save them as SVG or PNG.

Visualize schema.prisma models as cards and see relations between them at a glance.

Generate Zod validation schemas and types from the models and enums in schema.prisma.

Generate a repository interface, implementation class, and usage example from a schema.prisma model.

Generate dummy data, a MockRepository class, and test code from a TypeScript type or Prisma model.