Local input
The current tools process pasted text in the browser.
1024Base
Small tools for messy developer inputs.
Format JSON, decode Base64, compare URLs, convert timestamps, generate IDs, and clean text without opening a full app.
Input stays in the browser
No login step
Copy-ready results
Frequent jobs
Tools people usually need first.
JSON Formatter
Format and validate JSON data
JSON
Base64 Encode
Encode and decode Base64 strings
Encode
URL Encode
Encode and decode URL components
URL
Timestamp Converter
Read timestamps from logs and database rows
Time
String Compare
Compare copied tokens or IDs
Compare
CSS Unit Converter
Convert design specs from px to rem
CSS
Categories
Browse by the kind of value you are handling.
JSON Tools
2 tools
Format API responses, validate payloads, and clean config snippets.
Encoding Tools 1 toolEncode Base64, decode pasted values, and fix copied URL text.
Web Tools 2 toolsDecode query strings, compare links, and prepare callback URLs.
Text Tools 2 toolsCompare strings, convert case styles, and tidy names for code.
Conversion Tools 3 toolsRead timestamps, convert CSS units, and prepare test values.
CSS Tools 1 toolConvert units for layout checks and design handoff.
Product basics
The boring parts are intentional.
No account
Open a tool, paste a value, copy the result.
Quick feedback
Validation errors and converted output stay close to the editor.
Free tools
The public tools here are free for routine debugging.
Saved locally
Favorite tools
Recently opened
Recent tools
Common fixes
Start from the error.
Fix a JSON unexpected token error
Unexpected token errors usually mean the parser found a character that is not allowed at that exact point in the JSON.
Fix a Base64 invalid character error
Base64 decoding usually fails because the input contains extra text, a URL-safe alphabet, missing padding, or characters that are not part of standard Base64.
Unix timestamp seconds vs milliseconds
The same date can be written as Unix seconds or Unix milliseconds. Mixing the two is one of the fastest ways to get a date that looks wildly wrong.
Convert URL spaces to %20
Spaces are not safe inside URLs. Percent-encoding changes each space to %20 so the link can travel cleanly through browsers, APIs, and logs.
UUID v4 vs UUID v7
UUID v4 is random. UUID v7 includes time information, so newly generated IDs sort more naturally by creation time.
camelCase vs snake_case
camelCase and snake_case are both common naming styles. The right choice usually depends on the language, API, or project convention you are working inside.
Field notes
Short fixes for annoying inputs.
Fix a JSON unexpected token error
Unexpected token errors usually mean the parser found a character that is not allowed at that exact point in the JSON.
Read guideFix trailing commas in JSON
JSON does not allow a comma after the final item in an object or array, even though many JavaScript examples do.
Read guideFormat an API response for debugging
Raw API responses are often minified. Formatting gives each object and array enough space to inspect quickly.
Read guideMinify JSON without changing the data
JSON minifying removes whitespace and line breaks after the input parses successfully.
Read guideAll tools
Open the exact utility you need.
11 tools available
JSON Tools
JSON Formatter
Format API responses, config files, and logs Open
JSON Tools
JSON Validator
Check request payloads before sending them Open
Base64 Tools
Base64 Encode / Decode
Decode API tokens or headers you are inspecting Open
URL Tools
URL Encode Decode Tool
Convert spaces to %20 before sharing a link Open
URL Tools
URL Compare
Compare tracking links before publishing Open
Text Tools
Text Case Converter
Turn labels into variable names Open
Text Tools
String Compare
Compare copied tokens or IDs Open
Convert Tools
Timestamp Converter
Read timestamps from logs and database rows Open
Convert Tools
Time Unit Converter
Turn timeout values into readable durations Open
CSS Tools
CSS Unit Converter
Convert design specs from px to rem Open
Convert Tools
UUID Generator
Create test IDs for fixtures and requests OpenNo matching tools yet. Try a shorter search term.
About 1024base
Built around paste, run, copy.
1024base is a small set of browser tools for the values developers touch all day: JSON, encoded strings, URLs, timestamps, CSS units, IDs, and text. The site is designed to be plain, fast, and easy to return to.