Code to Image Converter
Export syntax-highlighted code as PNG or SVG for six languages with light and dark themes, line numbers, a window title, and 1x or 2x scale.
Developer / code evidence desk
Developer
Format, encode, verify, and inspect development data without setup.
Developer
31 essential tools. Format, encode, verify, and inspect the artifacts that keep development moving.
Showing 31 of 31 tools
URL Slug Generator
Turn titles into clean URL slugs with hyphens or underscores — accents stripped, ampersands expanded, non-Latin scripts preserved — live as you type.
React Native Shadow Generator
Compare legacy shadow properties and boxShadow for React Native, tune iOS and Android output side by side, and copy the StyleSheet code.
Base64 Encoder/Decoder
Encode Unicode text to Base64 or decode it back with live validation, URL-safe and UTF-8 options, and a swap button for round trips.
HTML Encoder/Decoder
Escape the five markup-breaking characters or decode named and numeric HTML entities back to text, locally, with one-click round trips.
URL Encoder/Decoder
Percent-encode query values or whole URIs and decode them strictly, across four modes that match how browsers split the job.
HTML Minifier
Minify HTML in a local Worker — comments removed, whitespace preserved — with byte statistics on up to 256 KiB of markup.
CSS Minifier
Minify CSS in a local Worker with a strict parse that names line and column on errors, keeping /*! license comments intact.
JavaScript Minifier
Minify JavaScript with Terser in a local Worker, with byte statistics and error positions — never executed, never uploaded.
HTML Formatter
Re-indent HTML with two- or four-space indentation and 100-column wrapping, with a strict parse that flags structural typos locally.
CSS Formatter
Re-indent CSS into readable, consistent rules with two- or four-space indentation, parsed strictly in a local Worker on your device.
JavaScript Formatter
Format JavaScript with a real parser in a local Worker — read untrusted code without executing it, at a two- or four-space indent.
MD5 Hash & Verify
Hash text or files up to 256 MiB with MD5 and verify against a known digest, locally. Unsuitable for adversarial integrity checks.
SHA-1 Hash & Verify
Hash text or files with SHA-1 and verify against a known 40-character digest, locally. Deprecated for signatures; fine for legacy identifiers.
SHA-224 Hash & Verify
Hash text or files with SHA-224 and verify against a known 56-character digest — the truncated SHA-2 variant, computed entirely in the browser.
SHA-256 Hash & Verify
Hash text or files with SHA-256 and verify against a published 64-character checksum, computed locally with case-insensitive comparison.
SHA-384 Hash & Verify
Hash text or files with SHA-384 and verify against a known 96-character digest — the truncated SHA-512 variant, run entirely in the browser.
SHA-512 Hash & Verify
Hash text or files with SHA-512 and verify against a known 128-character digest, computed locally in chunked Worker runs.
JWT Encoder/Decoder
Decode, sign, and verify JWTs across HS256-512, RS256-512, and ES256-512, with exp/nbf checks — keys and tokens never leave the tab.
JSON Tree Viewer
Explore JSON as a tree and format it locally, up to 256 KiB. Reject duplicate keys and trailing commas; export formatted or minified JSON without uploading.
UUID/ULID Generator & Validator
Generate batches of up to 100 UUID v4, UUID v7, or ULID identifiers with Web Crypto randomness, and validate pasted values structurally.
IPv4 Subnet/CIDR Calculator
Calculate network, broadcast, wildcard mask, and usable hosts for any IPv4 CIDR or netmask, with /31 and /32 edge cases handled per RFC.
JavaScript Regex Tester
Test JavaScript regular expressions with capture-group inspection, exact match offsets, replacement preview, and a Worker timeout for expensive patterns.
Structured Data Converter
Convert between JSON, YAML, and CSV with explicit formats, spreadsheet-safe CSV output, and fidelity warnings for every accepted loss.
SQL Formatter
Format or compact SQL across seven dialects — PostgreSQL, MySQL, SQL Server, and more — in a local Worker, without connecting to a database.
Timestamp & Time Zone Converter
Convert Unix timestamps, ISO dates, and wall times between explicit IANA zones with honest DST handling, plus ready-made Discord timestamp codes.
Text & JSON Diff
Compare text by line, word, or character and JSON by structure, with split and unified views, change navigation, and unified-patch export.
Cron Builder & Explainer
Build and explain five-field Unix cron expressions, with per-field expansion and a next-runs preview checked over 366 days in UTC.
Markdown & HTML Workspace
Convert between Markdown and sanitized HTML in both directions — scripts and remote media stripped — with visible notices for lost structure.
Docker Run to Compose
Translate docker run flags — ports, env, mounts, restart, and more — into a reviewable Compose service YAML, without contacting Docker.
Chmod Calculator
Translate octal and symbolic permissions into readable rwx bits, special-bit explanations, and copy-ready GNU chmod commands.
Developer workflows / transform data without hiding the steps.
Format, encode, verify, and inspect.
Prepare the source
Format or minify code with an explicit before-and-after result.
Open a matching toolMove between representations
Encode, decode, hash, and compare values inside a local workspace.
Open a matching toolVerify the artifact
Inspect structure and integrity before the result enters another system.
Open a matching toolBuilt for focused work / useful output without a setup step.
Browser-first by design.
Browser-first
Open the task. No utility package or account required.
Visible processing
See input, result, state, and execution label at every step.
Export-ready
Copy or download the useful result without cleanup.
Related categories
Continue the workflow with another focused collection.
Technical operating notes
Treat generated output as evidence, not magic.
Keep a known-good input
Retain the original source so formatting and conversion remain reversible.
Confirm the mode
Check whether the operation formats, encodes, hashes, or verifies.
Test the result
Validate output in its destination before relying on it in production.
Questions before you begin?
Which tools on this page run locally?
All tools currently listed here process active input in your browser without uploading it. Any future cloud or hybrid processing will be disclosed before use.
Will a transformation change my source?
Toolars works on a separate browser copy. Your original file or text stays unchanged unless you intentionally download and replace it.
Can I save a tool?
Yes. Sign in first so Toolars can save the favorite to your account and return you to the tool.
How do I report an incorrect result?
Each tool page includes a report surface. Submitted feedback contains only the message and page context you choose to send.
Missing a utility in this collection?
Tell us the input, the transformation, and the result you expect.