JavaScript (Node.js) IEEE 754 Single precision Floating-Point (32-bit) binary conversion from and to both Hex and Bin

float32encoding.js

/* ##### float32encoding.js #####
MIT License

- Forked 'toFloat' from https://gist.github.com/laerciobernardo/498f7ba1c269208799498ea8805d8c30
- Forked 'toHex' from stackoverflow answer https://stackoverflow.com/a/47187116/10522253
- Modifyed by: Jozo132 (https://github.com/Jozo132)

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

const Float32ToHex = (float32) => {
    const getHex = i => ('00' + i.toString(16)).slice(-2);
    var view = new DataView(new ArrayBuffer(4))
    view.setFloat32(0, float32);
    return Array.apply(null, { length: 4 }).map((_, i) => getHex(view.getUint8(i))).join('');
}

const Float32ToBin = (float32) => {
    const HexToBin = hex => (parseInt(hex, 16).toString(2)).padStart(32, '0');
    const getHex = i => ('00' + i.toString(16)).slice(-2);
    var view = new DataView(new ArrayBuffer(4))
    view.setFloat32(0, float32);
    return HexToBin(Array.apply(null, { length: 4 }).map((_, i) => getHex(view.getUint8(i))).join(''));
}

const HexToFloat32 = (str) => {
    var int = parseInt(str, 16);
    if (int > 0 || int < 0) {
        var sign = (int >>> 31) ? -1 : 1;
        var exp = (int >>> 23 & 0xff) - 127;
        var mantissa = ((int & 0x7fffff) + 0x800000).toString(2);
        var float32 = 0
        for (i = 0; i < mantissa.length; i += 1) { float32 += parseInt(mantissa[i]) ? Math.pow(2, exp) : 0; exp-- }
        return float32 * sign;
    } else return 0
}

const BinToFloat32 = (str) => {
    var int = parseInt(str, 2);
    if (int > 0 || int < 0) {
        var sign = (int >>> 31) ? -1 : 1;
        var exp = (int >>> 23 & 0xff) - 127;
        var mantissa = ((int & 0x7fffff) + 0x800000).toString(2);
        var float32 = 0
        for (i = 0; i < mantissa.length; i += 1) { float32 += parseInt(mantissa[i]) ? Math.pow(2, exp) : 0; exp-- }
        return float32 * sign;
    } else return 0
}

// Full example
var test_value = -0.3;
console.log(`Input value (${test_value}) => hex (${Float32ToHex(test_value)}) [${Math.ceil(Float32ToHex(test_value).length / 2)} bytes] => float32 (${HexToFloat32(Float32ToHex(test_value))})`);
console.log(`Input value (${test_value}) => binary (${Float32ToBin(test_value)}) [${Float32ToBin(test_value).length} bits] => float32 (${BinToFloat32(Float32ToBin(test_value))})`);

/* DEBUG OUTPUT:
  Input value (-0.3) => hex (be99999a) [4 bytes] => float32 (-0.30000001192092896)
  Input value (-0.3) => binary (10111110100110011001100110011010) [32 bits] => float32 (-0.30000001192092896)
*/

float32encoding.min.js

/* ##### float32encoding.min.js #####
MIT License

- Forked 'toFloat' from https://gist.github.com/laerciobernardo/498f7ba1c269208799498ea8805d8c30
- Forked 'toHex' from stackoverflow answer https://stackoverflow.com/a/47187116/10522253
- Modifyed by: Jozo132 (https://github.com/Jozo132)

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

const Float32ToHex = float32 => { const getHex = i => ('00' + i.toString(16)).slice(-2); var view = new DataView(new ArrayBuffer(4)); view.setFloat32(0, float32); return Array.apply(null, { length: 4 }).map((_, i) => getHex(view.getUint8(i))).join(''); }
const Float32ToBin = float32 => parseInt(Float32ToHex(float32), 16).toString(2).padStart(32, '0');

const ToFloat32 = num => { if (num > 0 || num < 0) { var sign = (num >>> 31) ? -1 : 1; var exp = (num >>> 23 & 0xff) - 127; var mantissa = ((num & 0x7fffff) + 0x800000).toString(2); var float32 = 0; for (i = 0; i < mantissa.length; i += 1) { float32 += parseInt(mantissa[i]) ? Math.pow(2, exp) : 0; exp-- } return float32 * sign; } else return 0 }
const HexToFloat32 = str => ToFloat32(parseInt(str, 16));
const BinToFloat32 = str => ToFloat32(parseInt(str, 2));


// ------ FULL EXAMPLE ------
var value = -0.3; // JS number variable

// FLOAT32 <===> HEX
var f32_hex = Float32ToHex(value); // JS number   =>   HEX string of a Float32 standard number 
var f32_hex_inverse = HexToFloat32(f32_hex); // HEX string of a Float32 standard number   =>   JS number

// FLOAT32 <===> BIN
var f32_bin = Float32ToBin(value); // JS number   =>   HEX string of a Float32 standard number 
var f32_bin_inverse = BinToFloat32(f32_bin); // HEX string of a Float32 standard number   =>   JS number

console.log(`Input value (${value}) => hex (${f32_hex}) [${Math.ceil(f32_hex.length / 2)} bytes] => float32 (${f32_bin_inverse})`);
console.log(`Input value (${value}) => binary (${f32_bin}) [${f32_bin.length} bits] => float32 (${f32_bin_inverse})`);

/* DEBUG OUTPUT:
  Input value (-0.3) => hex (be99999a) [4 bytes] => float32 (-0.30000001192092896)
  Input value (-0.3) => binary (10111110100110011001100110011010) [32 bits] => float32 (-0.30000001192092896)
*/

Yes. thank you. 👍
I was thinking to be used as a simple terminal tool.