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DevTools

Developer tools

Paste it. Read it. Move on.

21 tools for the response you cannot read, the token that expired, the two configs that should be identical. Every one of them runs in this tab — nothing you paste is uploaded.

Paste anything

Read here in your browser, never uploaded. JSON, JWT, YAML, CSV, SQL, cron expressions, timestamps, IP blocks, colours, URLs, Base64 and UUIDs are all recognised — and anything else is still text you can count, recase, hash or encode.

Read something

Make an opaque payload legible, and say plainly where it is malformed.

JSON FormatterJSON → JSONIndent, minify or sort a JSON document, and point at the line that broke it.JWT DecoderJWT → JSONRead a token's header and payload, with expiry shown as a real date.SQL FormatterSQL → SQLMake an unreadable query readable, in the dialect you actually use.Cron Parsercron → scheduleExplain a cron expression in words, and show when it next runs.CIDR Calculatorcidr → rangeWork out the network, broadcast and usable host range of a subnet.

Change the encoding

The same data in a different alphabet, so it survives a URL, a page, or the wire.

Base64text ⇄ base64Encode and decode Base64, including files to data URIs.URL Encodertext ⇄ %XXPercent-encode a value or a whole URL, and break a link into its parts.HTML Entity Encodertext ⇄ entitiesEscape text so it is safe inside HTML, or decode entities back.Number Base Converterint → intConvert between binary, octal, decimal, hex and any base up to 36.

Convert between formats

Move a document out of the shape it arrived in and into the one you need.

Timestamp Converterepoch ⇄ dateTurn a Unix timestamp into a date and back, in seconds or milliseconds.JSON to TypeScriptJSON → typesTurn a JSON sample into named TypeScript interfaces.CSV to JSONCSV ⇄ JSONConvert CSV to JSON and back, quoted fields and all.YAML to JSONYAML ⇄ JSONConvert YAML to JSON and back, anchors and multiple documents included.Color Convertercolor → colorConvert HEX, RGB, HSL and OKLCH, and check contrast against WCAG.

Compare and match text

Find what changed between two versions, or what a pattern actually captures.

Regex Testerpattern × text → matchesHighlight what a pattern matches, and list what each group captured.Text Difftext × text → diffCompare two versions line by line and see what was added and removed.Character Countertext → countsCount characters, words, lines and bytes, with reading time.Case Convertertext → textSwitch text between camelCase, snake_case, kebab-case and five more.

Generate

Produce identifiers, digests and codes locally, so nothing that keys your data was seen elsewhere.

UUID Generator() → uuidMake random v4 or time-sortable v7 identifiers, one or a thousand.Hash Generatortext → digestHash text with MD5, SHA-1, SHA-256, SHA-384 or SHA-512.QR Code Generatortext → qrTurn a URL or any text into a QR code you can download as SVG.

21 of 21 tools shown.