DevsBox
12 utilities · 100% client-side

DevsBox developer utilities that don't ship your data anywhere.

DevsBox formats JSON, decodes JWTs, escapes regex, and hashes strings — without a paste-bin gambling with your tokens. Everything runs in your browser. Nothing logs. Nothing phones home.

Browse 12 toolsOpen command palette⌘K
2.4ms
avg parse
0
network calls
∞
payload size
MIT
license

The toolkit

12 utilities · 4 categories

JSON Formatter

⌘1

Paste JSON, validate syntax, pretty-print readable output, or minify it locally in your browser.

.json.json

Base64 Encoder Decoder

⌘2

Encode plain text to Base64 or decode Base64 back to UTF-8 without uploading data.

.txt.txt

URL Encoder Decoder

⌘3

Encode query strings and decode percent-escaped URLs for APIs, redirects, and logs.

.url.url

Regex Tester

⌘4

Test JavaScript regular expressions live, inspect matches, and review capture groups client-side.

.regex.txt

JWT Decoder

⌘5

Decode JWT headers and payload claims locally, with readable JSON output and expiry hints.

.jwt.json

Markdown Editor

⌘6

Write Markdown and preview the rendered structure instantly in a browser-only editor.

.md.html

MD5 Hash Generator

⌘7

Generate MD5 digests for checksums and legacy comparisons directly in the browser.

.txt.txt

Diff Checker

⌘8

Compare two snippets line by line with a compact unified diff view.

.txt.patch

XML Formatter

⌘9

Format XML with indentation, basic validation, and readable tag structure locally.

.xml.xml

UUID Generator

⌘0

Generate RFC 4122 UUID v4 values, copy batches, and validate UUID strings.

.ts.txt

SQL Formatter

⌘.

Format SQL queries with line breaks around common clauses for easier review.

.sql.sql

SHA-256 Hash Generator

⌘/

Generate SHA-256 hashes and SHA256 hash digests using browser crypto for modern checksum workflows.

.txt.txt

100% client-side

Every formatter runs in your browser. No data leaves your machine — even pasted JWTs.

No tracking

No telemetry, no fingerprinting, no analytics beacons. Open the network tab and verify.

Sub-5ms parse

Lean parsers for JSON, XML, and SQL. Comfortable with payloads over 50MB.

Open patterns

Conventional Web APIs only. WebCrypto, TextEncoder, SubtleCrypto — no exotic deps.

Popular by format pair

6 converters · CSV · YAML · XML · JSON · TS

CSV to JSON

Turn a CSV table into a JSON array of objects in your browser, with header rows mapped to property keys.

/json-formatter/csv-to-json/

YAML to JSON

Convert YAML configuration into strict JSON locally, useful for CI pipelines, Helm values, and OpenAPI specs.

/json-formatter/yaml-to-json/

XML to JSON

Translate XML payloads to JSON in your browser, with attributes mapped to a predictable @ prefix convention.

/json-formatter/xml-to-json/

JSON to TypeScript

Generate a TypeScript interface tree from a JSON sample to scaffold typed API clients in seconds.

/json-formatter/json-to-typescript/

JSON to CSV

Flatten a JSON array of objects into a CSV table for spreadsheets, BI tools, or migration scripts.

/json-formatter/json-to-csv/

JSON to YAML

Generate readable YAML from a JSON document, ideal for Kubernetes manifests, CI configs, and Helm values.

/json-formatter/json-to-yaml/