14 free tools

Developer & Data tools

Free developer tools in your browser: JSON, CSV and SQL studios, code beautifier, diff checker, regex tester, hash, Base64, UUID and cron builders. No upload.

Data Architect StudioDeveloper & DataConvert JSON, CSV, YAML, XML and SQL; generate mock data; decode JWT and epoch.JSON to CSV / YAML / XML / SQLIndian mock data generatorOffline JWT decoderUnix epoch converterFreeOpen →Code Beautifier & FormatterDeveloper & DataFormat and minify HTML, CSS, JS, JSON, SQL, YAML and Markdown.Prettier-powered formattingMinify and beautifySyntax highlightingMulti-language supportFreeOpen →CodeStudio PlaygroundDeveloper & DataRun Python, JavaScript, SQL and HTML live; study reference programs in 8 more languages.Python 3 via SkulptJavaScript sandboxSQLite query runnerLive HTML previewFreeOpen →SQL & Database StudioDeveloper & DataDesign schemas and run real SQL on an in-browser SQLite engine.Real SQLite (WASM)Multiple isolated databasesVisual schema designerVisual JOIN builderFreeOpen →JSON StudioDeveloper & DataValidate, explore, query, diff and transform JSON with a tree view.Tree explorerPath query engineJSON Schema inferenceStructural diffFreeOpen →Diff CheckerDeveloper & DataCompare two texts or files line by line and word by word.Side-by-side and inline viewsWord-level highlightingIgnore case and whitespaceUnified patch exportFreeOpen →Cron Expression BuilderDeveloper & DataBuild, explain and preview cron schedules in plain English.Field-by-field builderPlain-English explanationNext 20 run timesPreset libraryFreeOpen →Encoder & Decoder StudioDeveloper & DataBase64, URL, HTML, hex, binary, ROT13 and Morse in one place.12 encoding schemesFile to data URIBatch line modeAuto-detect inputFreeOpen →Hash & Checksum GeneratorDeveloper & DataSHA-1/256/384/512, HMAC, CRC32 and file checksums via WebCrypto.WebCrypto SHA familyHMAC with secret keyCRC32 and simple digestsDrag-and-drop file hashingFreeOpen →UUID & ID GeneratorDeveloper & DataBulk UUID v4/v7, ULID, NanoID, slugs and secure tokens.UUID v4 and v7ULID and NanoIDSequential business numbersBulk up to 10,000FreeOpen →Regex & Password StudioDeveloper & DataTest regular expressions live and measure real password entropy.Live regex matchingCapture group inspectorPattern libraryEntropy in bitsFreeOpen →CSV & Excel StudioDeveloper & DataOpen, clean, filter, pivot and convert CSV and XLSX files.CSV / TSV / XLSX importFilter, sort, deduplicateFind and replacePivot summariesFreeOpen →Text ToolkitDeveloper & DataCase conversion, counting, cleanup, sorting, dedupe and analysis.12 case transformsLive word and read-time statsLine sort and dedupeHTML and whitespace cleanupFreeOpen →Markdown StudioDeveloper & DataWrite Markdown with live preview and export to HTML or print.Live split previewGFM tables and task listsDocument outlineToolbar shortcutsFreeOpen →

About these developer & data tools

Formatters, converters, generators and database tooling that run entirely in the browser. Data Architect Studio, Code Beautifier & Formatter, CodeStudio Playground, SQL & Database Studio, JSON Studio, Diff Checker, Cron Expression Builder, Encoder & Decoder Studio, Hash & Checksum Generator, UUID & ID Generator, Regex & Password Studio, CSV & Excel Studio, Text Toolkit, Markdown Studio.

They are part of CRMTECH Solutions's 50 free business tools. Each one runs in your browser and links to the tools it works with, so you can move from one step of your work to the next.

Frequently asked questions

Are these Developer & Data tools free?

Yes. All 14 tools are free to use with no sign-up. An account is only needed to export, download or print.

Do I need to install anything?

No. Every tool runs in your web browser on a computer, tablet or phone.

Are my files uploaded?

No. Files are processed inside your browser on your own device. Signed-in users can also keep their saved work in their account.